CLASS: VIII
DAILY ASSIGNMENT
SUBJECT WISE COMPILED ANSWER KEY
FOR WEEK -4 (11.05.2020 T0 16.05.2020)
SUBJECT: ENGLISH
11.05.2020: UNSEEN PASSAGE
A1. (D) – He wanted to impress the salesman
Justification: Because when he came in casual dress in the morning, he got very little
attention.
A2. (C) – only rich customers
Justification: The sale of the shop depends on rich and well-off customers who came there to
spend money.
A3. (A) – He was not interested in purchasing anything now.
Justification: He had no intentions of buying anything. He was just doing show off.
A4. (A) – He would give him exactly what he was looking for.
Justification: The salesman was unable to satisfy the man.
A5(C) – He had come only to make a point about the indifferent attitude of the salesman
towards casually dressed customers.
Justification: He had a bad experience when he had been to the shop earlier. The salesman
did not show respect to him as he was casually dressed.
12.05.2020: PRONOUNS
A1. (B) – anything
Justification: It is used instead of something in negative sentences and in questions;
after if/whether; and after verbs such as prevent, ban, avoid, etc.
A2. (A) – everything
Justification: It is used for an identifiable, but not specified, person or thing.
A3. (A) – something
Justification: It is used for referring to a thing, idea, fact etc when you do
not know or say exactly what it is
A4. (A) – no one
Justification: No one is used where it means no person; not a single person. No one can also
be employed with an additional noun, where one describes singularity to the noun and
no inverts it.
A5. (A) – no one
Justification: No one is used where it means no person; not a single person. No one can also
be employed with an additional noun, where one describes singularity to the noun and
no inverts it
13.05.2020: POETRY COMPREHENSION
A1. (D) – The sun descends in the west
Justification: After sunset, the stars appear In the sky.
A2. (C) – a bouquet of flowers
Justification: Because in heaven, the moon looks like a bouquet.
A3. (A) – flower
Justification: The moon shines at night in the sky and smiles on earth.
A4. (B) – give blessing and joy
Justification: The angels are considered as good souls who give blessings to all living beings.
A5. (D) – The occupants are asleep without any care.
Justification: The occupants in the nest are the birds who are sleeping in their nests during
night.
14.05.2020: POETRY COMPREHENSION
A1. (C) – He gave some money (gold refers to money)
Justification: Because the poet was sad and unhappy.
A2. (D) – Sympathy
Justification: The proud man was very stone hearted. He did not speak a word to the poet.
A3. (C) – The poor man gave food to the poet and took care of him day and night.
Justification: He helped the poet when he was in pain and deep sorrow.
A4. (B) – The poor man blessed the charity of the poet.
Justification: This statement is not true because the poet had nothing to return to the poor
man.
A5. (A) – Charity
Justification: This word charity means to help someone with money or donation.
15.05.2020: LESSON 1 : FOOTLOOSE IN AGRA
A1. (C) – rickshaw pullers, tonga drivers, cyclists
Justification: The roads of Agra are crowded therefore rickshaws and tongas are convenient.
A2. (A) – Fruit of Ashoka tree
Justification: He was the son of head gardener and so he used to pluck fruit of Ashoka tree
and eat them.
A3. (D) – Footloose in Agra
A4. (D) – Ruskin Bond
Justification: He has shared his experience of Agra and beauty of Taj Mahal.
A5. (B) – The sharp flavour of Ashoka tree
Justification: The taste of the fruit was sour but not unpleasant.
16.05.2020:UNSEEN PASSAGE
A1. (C) – It has wrinkled skin covered with yellow feathers.
Justification: Pigeon is considered as a revolting bird due to its unpleasant appearance.
A2. (A) – he was fat and ugly.
Justification: The bird looked ugly and repulsive. The colour of pigeon was horrible yellow
with wrinkled scarlet skin.
A3. (C) – he complained loudly if he was not taken along
Justification: The pigeon Quasimodo used to go walking with them as it never considered
itself to be a bird.
A4. (D) – left behind during walks.
Justification: The pigeon could not match with their speed as it walked slowly.
A5. (B) – there was a chance of the bird soiling the clothes
Justification: If the bird was allowed to be carried on the shoulder, there was a risk of getting
the clothes spoilt.
SUBJECT: COMPUTER
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:11.05.2020
1. (c) Computer software
Explanation:. They are the set of machine readable instructions that directs a processor to
perform specific operations.
2. (a)1 Megabyte
Explanation:
8 bits 1 byte
1024 bytes 1 KB(kilobyte)
1024 KB 1 MB(megabyte)
1024 MB 1 GB(gigabyte)
1024 GB 1 TB(terabyte)
1024 TB 1 PB(Petabyte)
1024 PB 1 EB(Exabyte)
1024 EB 1 ZB(zetabyte)
3. (a)Wired
Explanation: It includes electrical cables that are used to carry signals from one end to
other.
4. (d) Format
Explanation: Components of database are-Fields, table, table structure, queries, datasheet,
reports, forms.
5. (a)Topology
Explanation: It is the arrangement of the elements of a communication network which
comprises of nodes and connecting lines.
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:12.05.2020
1. (b)Mouse
Explanation: It consists of a roller at the bottom on which it can roll the upper part .It is
popularly known as a pointing device
2. (a)1 Gigabyte
Explanation:
8 bits 1 byte
1024 bytes 1 KB(kilobyte)
1024 KB 1 MB(megabyte)
1024 MB 1 GB(gigabyte)
1024 GB 1 TB(terabyte)
1024 TB 1 PB(Petabyte)
1024 PB 1 EB(Exabyte)
1024 EB 1 ZB(zetabyte)
3. (a)Banks and offices
Explanation:. Computers are used extensively for storing information and processing
transactions from an account.
4. (b)Slow data access
Explanation: Advantages of using database:
Simple, Faster data Access, Better Data Transferring, Minimized Data Inconsistency
5. (a) Mesh topology
Explanation: Every devices is connected to another devices via particular channel
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:13.05.2020
1. (b)Wireless local area network
Explanation:. WLAN means wireless local area network. A wide area network (WAN) is
a telecommunications network that extends over a large geographical area for the primary
purpose of computer networking
2. (d) Cell
Explanation:. 1) Ribbon: It displays groups of related commands in tabs.
2) Database objects: An access database has four main objects – Tables, Queries, Forms and
Reports.
3) Navigation Pane: It lists all available database objects.
4) Status Bar: It displays information about the current object or view.
5) Work area: It differs according to database elements select
3. (b)Key topology
Explanation: Types of topologies are mesh, ring, star, hybrid and bus topology.
4. (a)LAN
Explanation:. A LAN connects network devices over a relatively short distance. A
networked office building, school, or home usually contains a single LAN. LANs are also
typically owned, controlled, and managed by a single person or organization.
5. (a)Star topology
Explanation: In star topology all the devices are connected to single hub through a cable
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:14.05.2020
1. (a)Network interface card
Explanation. It is a hardware device that has a port which helps to join the network cable to
the computer. Every computer in the network has one NIC
2. (d)Login security
Explanation: : Only those people who have a username and a password can access the data
3. (a)Modem
Explanation: : It is a device that joins the digital to analogue telephone line.
.4.(a)Wired media
Explanation: . It includes electrical cables that are used to carry signals from one end to
other.Ex- twisted pair cable, optical fiber.
5.(d)Bus topology
Explanation: It is a network in which every computer and network devices is connected to
single cable.
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:15.05.2020
1. (c) PAN
Explanation: Personal area networks can be wireless or constructed with cables. This may
include Bluetooth enabled devices or infra-red enabled devices. PAN has connectivity range
up to 10 metres.PAN includes wireless computer keyboard and mouse.
.2. (b)Rights security
Explanation: User can access only certain folders pertaining to his/her own work
3. (d)Fields
Explanation: A field is a segment of information that when grouped with other related
segments, provides a detailed record for a specific object. A field, for example, would be
specific information regarding the employee, perhaps the employee's name, hire date or social
security number.
. 4. (c) Wireless media
Explanation: They do not use cables instead the signals are transmitted using Bluetooth,
infrared, microwave or radio wave.
5. (b)Ring topology
Explanation: In this topology, it forms a ring connecting a devices with its exactly two
neighboring devices.
ANSWERS TO ASSIGNMENT/CLASS-VIII/COMPUTER/DATE:16.05.2020
1. (b) MAN
Explanation: A metropolitan area network (MAN) is a network with a size greater than
LAN but smaller than a WAN. Network size generally ranges from 5 to 50 km. It may be as
small as a group of buildings in a campus to as large as covering the whole city.
2. (a)2 GB
Explanation: OLE objects can store pictures, audio, video, or other BLOBs (Binary Large
Objects) Up to about 2 GB.
3. (d) Status Bar
Explanation: It displays information about the current object or view.
4. (c) Wireless media
Explanation: They do not use cables instead the signals are transmitted using Bluetooth,
infrared, microwave or radio wave.
5. ( c) Hybrid topology
Explanation:. This topology is a collection of two or more topologies .It is reliable one but
at the same time it is costly topology
SUBJECT: MATHS
SOLUTIONS
Date:11.05.2020
1. Ans: ( c) 1
Sol: Divisibility test 3, if the sum of all the digits are divisible by 3 then the number is
divisible by 3. So, x = 1
2. Ans: (a) 3
Sol: Divisibility test 9, if sum of all the digits are divisible by 9 then the number is
divisible by 9. So, x = 3
3. Ans: (a) A = 7, B = 6
Sol: By addition
4. Ans: (c) -6
Sol: Here numerical coefficient is -6
5. Ans: (c) 5
Sol: To find the degree,we have to add the exponents of all the terms of the
expression,which is the highest power of the term in that expression, that is the degree
.
Date: 12.05.2020
1. Ans: (a)
Sol: Using formula: -
So
Where, a = 5, b = -7, c = 9
2. Ans: (a) Z + 4
Sol: = Z + 4
3. Ans: (a) x (x + 3)
Sol: =
4. Ans: (c) -4
Sol: X = - 1, then 1 - 5 = - 4
5. Ans: (b) X + Y + Z
Sol: = X +Y + Z
___________________________________________________________________________
______
Date: 13.05.2020
1. Ans: (a)
2. Ans: (d) Since, Volume = l*b*h =
3. Ans (c) Since
4. Ans (c) After putting the value of x = 1 in the given equation, the resultant is 4
5. Ans (d)
Date: 14.05.2020
1. Ans (b) Taking a and c common by forming groups of first 2 terms and the last 2
terms, we get
2. Ans (d) Taking a common from the two terms we get
3. Ans (a)
4. Ans (b) Since
5. Ans (a) 2, Divisibility rule of 11 states that the if we subtract the sum of digits in even
positions and the sum of digits in odd positions, if we get 11 or 0 then the number is
divisible by 11.
Hence,
x = 2
Date:15.05.2020
1. Ans (c) Since -4/3 = -1.33 which lies between -1 and -2
2. Ans (a) -6,
3. Ans (b) 1, Since
4. Ans (b) 1/4, Since -5/4 + 1/4 = -4/4 = -1, Hence
5. Ans (a)
Date:16.05.2020
1. Ans (b) 625, Since
2. Ans (c) 3, Since
3. Ans (d) 1, Since , Since 30 just has one zero, Hence.
4. Ans (c) 64/225, Since Hence
5. Ans (b) 9, Since
SUBJECT: PHYSICS
ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/ 11-05-2020
1. ( d) speed
Explanation: A force applied on an object may change its speed. If the force
applied on the object is in the direction of its motion the speed of the object
increases. If the force is applied in the direction opposite to the direction of motion
then its result in a decrease in the speed of the object.
2. (c) zero
Explanation:The force on an object is zero if the two forces acting on it in opposite
direction are equal in magnitude .This kind of force is called balanced force.
3. (a) muscular force
Explanation: Because the archer has to touch the bow in order to pull it .
4. (d) electrical force
Explanation: Because it is a non contact force.
5. (b)Heating
Explanation: Because heating is a form of energy
.ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/ 12-05-2020
1. (a)nature of surface of contact
Explanation :Because if the object has irregularities on its surface i.e. the surface is
rough then the force of friction would be more .If there are no irregularities on the
surface i.e. the surface is smooth then the force of friction decreases.
2. (b)Force of friction< applied force
Explanation: Force applied is greater than the maximum frictional force offered by
the surface .In this case body will move in the direction of force applied.
3. (a) weight
Explanation: All liquid have weight .The pressure exerted by a liquid is small just
under the surface of the liquid. But as we go deeper in a liquid the pressure in a liquid
increases. As the depth of liquid increase the weight of liquid column pushing down
from above increases and hence pressure increases.
4. (b) the cross sectional area of the reservoir
Explanation:The pressure of water near bottom of the dam forming a dam depends
on the depth of water, density of water and atmospheric pressure whereas its is
independent of the cross sectional area of the reservoir.
5. (a) Space
Explanation:Friction caused by things in physical contact with each other ,is largely
absent in space .Space is almost totally empty, so there is no road for the space to rub
against .There is no air resistance in space because there is no air in space.
ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/13-05-2020
1. (b) decrease
Explanation: Because as the object moves across the rough surface it decelerates due
to friction. This will reduce the speed of the object until it has completed its course
over rough surface .
2. (d)all above these
Explanation: Friction is a force which opposes the relative motion between the
surface .Its acts equal to the applied force until reaches its limiting value after that
limiting value acts.
3. (a)Change of position
Explanation: Magnet exert forces and torques on each other due to the rules of
electromagnetism
4. (a) Parallel to the contact surfaces
Explanation: Frictional force always acts parallel to two planes in contact with each
other and in a direction opposite to that of relative motion of the two bodies.
5. (C) Becomes 4 times
Explanation :
P= F/A
F’=2F
A’ =A/2
P’=2F/A/2=4 (F/A )
P’=4P
ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/ 14-05-2020
1. (d) both ‘b’ and ‘c’ are correct.
Explanation: Because muscular force is applied by us.
2. (a) to increase the supporting area .
Explanation: by doing this they increase the area of contact of the load with their
head .So the pressure in their head is reduced and they find it easier to carry the load.
3. (b)kicking a football
Explanation: while applying force on the football the ball will move any direction.
4. (c) the combination of forces acting on it balances each other.
Explanation: parallel equal forces acting in opposite direction in the same line of
action.
5. (a)by its magnitude
Explanation :The magnitude of force is expressed in the SI unit of force called
Newton.
ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/ 15-05-2020
1. ( d ) the sum of all the forces is zero
Explanation: there is no external force acting on boat
2. ( b ) downward
Explanation: due to its mass
3. ( d) contact force
Explanation:In performing the tasks he uses muscular force and muscular force can
be applied only when it is in contact with an objects.
4. ( d) increases frictional force
Explanation: because truck and buses carry heavier load / more weight it therefore
means it requires more traction/ friction with ground to move the load efficiently and
effectively.
5. ( a ) gravitational force and frictional force
Explanation: because these two forces affect many motions on Earth .
ANSWER TO ASSIGNMENT /CLASS 8/PHYSICS/ 16-05-2020
1. ( a ) 2 N
Explanation : FNet = F1 – F2
= 10 N – 8 N = 2 N
2. ( a ) does not move
Explanation :because resultant force is zero.
3. ( b ) moves to east direction
Explanation : because F1 >F2
4. ( a ) O N
Explanation : because resultant force is zero
10 10 N
5. ( a ) O N
Explanation : because resultant force is zero
SUBJECT: CHEMISTRY
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 11-05-2020
1. (D) Brittle
Explanation: metals are lustrous, ductile, malleable, and good conductors of
electricity, while nonmetals are generally brittle (for solid nonmetals), lack lustre,
and are insulators.
2. (B) Electrical conductivity
Explanation: Electric conductivity is the movement of electrically charged particles.
All metals conduct electricity to a certain extent, but certain metals are more highly
conductive. The most highly conductive metals are silver, copper, and gold. Copper
3. (C)Lithium
Explanation: The lightest or least dense metal that is a pure element is lithium,
which has a density of 0.534 g/cm3. This makes lithium nearly half as dense as water.
4. (A) Brittle
Explanation: Sulphur is a nonmetal. It cannot be drawn into wires or changed into
sheets. It is very soft and hence, is brittle in nature.
5. (C) Si
Explanation: Silicon is neither metal nor non-metal; it's
a metalloid, metalloids generally have properties of both metals and non- metals
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 12-05-2020
1. (B) Si
Explanation: Silicon is in - between metals and non metals. it shows both the
properties of metals and non metals. Hence, it is called a metalloid or semi
conductor.
2. (B) Reflect light
Explanation: Objects reflect light differently can be attributed to a property
called 'luster. ' Luster is a property that describes how light is reflected on the
surface of a mineral.
3. (B) Magnetic
Explanation: Magnetic alloys have become common, especially in the form of
steel (iron and carbon), alnico (iron, nickel, cobalt, and aluminum), and permalloy
(iron and nickel). The strongest magnetic element is iron, which allows items made out of
these alloys to attract to magnets.
4. (A) Light
Explanation: Non-metals vary greatly in appearance. They do not have lustre. As it does
not have any free electrons light falling on non-metals does not reflect and hence non-
metals are not shiny. Hence, they have a very dull appearance.
5. (B) Metalloid
Explanation: Elements that have properties of both metals and nonmetals are
called metalloids. They can be shiny or dull and their shape is easily changed.
Metalloids typically conduct heat and electricity better than nonmetals but not as
well as metals.
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 13-05-2020
1.(B) It is a good conductor of electricity
Explanation: It has high electrical conductive; it's inexpensive; it's ductile; and it's
thermal resistant.
2. (B) Because the bonding between metal atoms is strong and cannot break
Explanation: Metals are malleable. This means that they can be hammered or
pressed into different shapes without breaking. They are also ductile, which means
that they can be drawn out into thin wires without breaking.
In each case, we are changing the shape of the metal without cracking or breaking it.
This is possible because the metallic bonds are strong but not directed between
particular ions.
3. (A) Metals
Explanation: Metals will have a high melting point, solid at room temperature,
malleable, ductile and sonorous
4. (D) piece of coal
Explanation: non – metals are brittle in nature.
5. (C) metalloid
Explanation: silicon has the intermediate characteristics of metal and
non metals.
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 14-05-2020
1. (B) All metals are hard and strong
Explanation: Sodium and potassium are soft and can be cut with a knife.
2. (C) x = pencil lead , Y = wooden block
Explanation: pencil lead is good conductor of electricity but wooden block
do not conduct electricity
3. (D) iron
Explanation: Metals are malleable. This means that they can be hammered or
pressed into different shapes without breaking.
4. (C) tooth pick
Explanation: tooth pick is made up of wood so it does not conduct
electricity
5. (D) brittle
Explanation: Sulphur is a nonmetal. It cannot be drawn into wires or changed into
sheets. It is very soft and hence, is brittle in nature.
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 15-05-2020
1. (A) Metal
Explanation: Because malleability and ductility are the properties of metal.
2. (C) Silicon
Explanation: silicon has the intermediate characteristics of metal and
non metals.
3. (B) An exposed iron rod
Explanation: It occurs when Iron, Oxygen and Water (air moisture) When
they combine, the iron loses electrons to oxygen atoms. This is called oxidation
and when it happens it produces a chemical reaction forming Fe203 Iron Oxide
otherwise known as Ferric Oxide, or more commonly known as rust.
4. (C) An alloy
Explanation: An alloy is a homogeneous mixture of two or more metals or
a metal and non-metal.
5. (D) Helium
Explanation: The gases like hydrogen and helium are used in
the balloons because they are lighter than the air. But helium is more preferable
than hydrogen because helium is non-combustible and that's why it is more safe to
use.
ANSWER TO ASSIGNMENT /CLASS 8/CHEMISTRY/ 16-05-2020
1. (C) Chlorine
Explanation: Chlorine is used to sterilize drinking water supply and the water
in swimming pool. This because chlorine kills the germs and bacteria present in
water and makes the water fit for consumption. Chlorine is the non metal which is used to
disinfect the water.
2. (C) Pb
Explanation: lead, is widely used because it is very dense, thereby providing a
high amount of mass and thus, kinetic energy for a given volume very high. The
heavy lead core delivers its kinetic energy to the target.
3. (B) C
Explanation: This stable network of covalent bonds and hexagonal rings is the
reason that diamond is as incredibly strong as a substance. Diamond and Graphite
and Diamond and graphite are two allotropes of carbon — pure forms of the
same element that differ in structure.
4. (B) Iodine
Explanation: Iodine is a non-metal which is used to make purple- coloured
solution called tincture iodine which is applied on cuts and wounds as an antiseptic.
5. (C) Argon
Explanation: There is no vacuum in the electric bulb. On the contrary, argon
gas or argon gas mixed with a little nitrogen is filled in the bulb under some
pressure. Argon increases bulb life by preventing the tungsten filaments from
deteriorating too quickly. Helium is used in lighting of the bulb.
SUBJECT: BIOLOGY
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:11.05.2020
1. (a) Microbiology
Explanation: The study of microorganisms is called microbiology.
2. (a) Thiomargarita namibiensis
Explanation: Thiomargarita namibiensis is a Gram-negative coccoid Proteobacterium,
found in the ocean sediments of the continental shelf of Namibia. It is the largest
bacterium ever discovered, as a rule 0.1–0.3 mm (100–300 μm) in diameter, but
sometimes attaining 0.75 mm (750 μm).
3. (a) Virus
Explanation: Viruses are non-living things outside the body of any organism but
reproduce once it enter in a host. That is why they are considered as link between
living and non-living.
4. (d) Antonie van Leeuwenhoek
Explanation: Antonie van Leeuwenhoek is considered a father of microbiology as he
observed and experimented with microscopic organisms in 1676, using simple
microscopes of his own design.
5. (a) Euglena
Explanation: The Phytomastigophorea includes chlorophyll-
containing protozoans that can produce their food photosynthetically, as do plants—
e.g., Euglena and dinoflagellates.
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:12.05.2020
1. (a) Fermentation
Explanation: Fermentation is a metabolic process in which an organism converts a
carbohydrate, such as starch or a sugar, into an alcohol or an acid.
2. (a) Armillaria mellea
Explanation: It is a plant pathogen and part of a cryptic species .
3. (c) Edward Jenner
Explanation: Jenner was the pioneer of the smallpox vaccine, as his experiments
opened the pathway of the discovery of the immune system. He observed the immune
capabilities by injecting pus of an infected person to a healthy host.
4. (b) Antibiotics
Explanation: Antibiotics are medicines that help stop infections caused by bacteria.
They do this by killing the bacteria or by keeping them from copying themselves or
reproducing.
5. (a) Bacteria
Explanation: Animal proteases and microbial proteases from bacteria is used in the
pre-tanning processes of leather manufacture.
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:13.05.2020
1. (b) Growth of yeast cells
Explanation: Bread rises because yeast eats sugar and burps carbon dioxide, which is
trapped by the bread's gluten.
2. (b) Streptomycin
Explanation: Antibiotics are medicines that help stop infections caused by bacteria.
They do this by killing the bacteria or by keeping them from copying themselves or
reproducing.
3. (c) Cholera
Explanation: Cholera is an infectious disease that causes severe watery diarrhoea,
which can lead to dehydration and even death if untreated. It is caused by eating food
or drinking water contaminated with a bacterium called Vibrio cholerae.
4. (c) Malaria
Explanation: Malaria is caused by the Plasmodium parasite.
5. (d) B & D
Explanation: Rhizobium and blue green algae increases the fertility of the soil by
nitrogen fixation.
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:14.05.2020
1. (d) Protozoa
Explanation: Protozoa is an informal term for single-celled eukaryotes, either free-
living or parasitic, which feed on organic matter such as other microorganisms or
organic tissues and debris.
2. (a)Bacteria
Explanation: Bacteria is used in jute industry for separating jute fibres from the stem.
3. (a) Blue green algae
Explanation: A few living organisms are able to utilize molecular N2 gas from the
atmosphere. The best known of these are the symbiotic Rhizobia (legume bacteria),
non-symbiotic free-living bacteria such as Azotobacter and Clostridium, and blue-
green algae.
4. (b) Vitamin B complex
Explanation: Yeast is an important source of Vitamin B Complex. It is also known as
invertase. It is best for the body growth, and helps in making your body stronger from
inside.
5. (c) Bacteria
Explanation: Biological treatments rely on bacteria, nematodes, or other
small organisms to break down organic wastes using normal cellular processes.
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:15.05.2020
1. (d) Bacteria
Explanation: A type of bacterium called Mycobacterium tuberculosis causes
Tuberculosis (TB). Its spread when a person with active TB disease in their
lungs coughs or sneezes and someone else inhales the expelled droplets, which
contain TB bacteria.
2. (b) Louis Pasteur
Explanation: Proving the germ theory of disease was the crowning achievement of the
French scientist Louis Pasteur.
3. (b) Kitasato shibasaburo
Explanation: He became the first person to grow the tetanus bacillus in pure culture,
and in 1890 cooperated with Emil von Behring in developing a serum therapy
for tetanus using this pure culture.
4. (c) Electron microscope
Explanation: Long after optical microscopes have reached their limit, the
electron microscope goes on magnifying up to 200,000 times was discovered.
5. (b) Anaerobic bacteria
Explanation: Organisms capable of producing methane have been identified only from
the domain Archaea, a group phylogenetically distinct from both eukaryotes and
bacteria, although many live in close association with anaerobic bacteria.
ANSWER TO ASSIGNMENT/ BIOLOGY /CLASS VIII/DATE:16.05.2020
1. (b) Trichonympha
Explanation: Trichonympha have the enzymes needed to convert cellulose in wood
into starches and sugars that the termite can use as nutrients.
2. (d) Rhinovirus
Explanation: Many different types of viruses can cause common cold.
3. (d) Both A & B
Explanation: Microbial spoilage is caused by microorganisms like fungi (moulds,
yeasts) and bacteria. They spoil food by growing in it and producing substances that
change the colour, texture and odour of the food.
4. (a) Vaccine
Explanation: Vaccines are made from microbes that are dead or inactive so that they
are unable to cause disease.
5. (a) Protozoa
Explanation: ‘Pro’ means primitive and ‘zoa’ means animal thus called as first
animal.
SUBJECT- HISTORY/CIVICS
DATE - 11-05-2020
1. (b) Warren Hastings
Explanation:- Warren Hastings propagated the policy of paramountcy.
2. (c) Presidencies.
Explanation: British had divided their territories into administrative units called
Presidencies.
3. (b) Calcutta
Explanation: the Sardar Nizamat Adalat was set up in Madras.
4. (b) 1773
Explanation: A new Supreme Court was established under the regulating act of 1773.
5. (d)63%
Explanation: By 1857 the Company had 63% of Indian Territory under its direct rule.
ANSWER TO ASSIGNMENT
DATE - 12-05-2020 CLASS – VIII SUBJECT - HISTORY
1. (c) Trained Soldiers on horseback
Explanation:- Cavalry refers to Trained Soldiers on horseback.
2. (b) Holt Mackenzie
Explanation: The mahalwari settlement was introduced by Holt Mackenzie
3. (c)Ryotwari System
Explanation: Ryotwari system was the system under which settlement was made directly
with the cultivators.
4. (d) Paramountcy
Explanation: After capturing Afghanistan , Sindh , Maratha and Punjab the British claimed
their Paramountcy.
5. (b) Rani Chennamma
Explanation: Rani Chennamma led an Anti British resistance in Kittor, Karnataka.
ANSWER TO ASSIGNMENT
DATE - 13-05-2020 CLASS – VIII SUBJECT - HISTORY
1. (b) Lord Warren Hastings
Explanation:- Lord Warren Hasting was the first Governor General of India.
2. (a) 1849
Explanation: In 1849 , Punjab came under Company Rule.
3. (c) Village
Explanation: Mahal refers to Village.
4. (a) Cultivators
Explanation: Ryots were cultivators.
5. (a) Ryotwari
Explanation: Ryotwari system of land revenue is also termed as the Munroe System.
ANSWER TO ASSIGNMENT
DATE - 14-05-2020 CLASS – VIII SUBJECT - HISTORY
1. (a) Soil
Explanation:- Growing Indigo exhausted the soil.
2. (c)Less than 25%
Explanation: Land producing Indigo under Nij cultivation remained less than 25%.
3. (c) Industrial Revolution
Explanation: Britain’s cotton production rose dramatically due to Industrial revolution.
4. (d) Bengal
Explanation: 95% of the Indigo import into Britain, came from Bengal.
5. (c) Mahalwari
Explanation: Under Mahalwari settlement the village headman had the responsibility of
collecting the revenue.
ANSWER TO ASSIGNMENT
DATE - 15-05-2020 CLASS – VIII SUBJECT - HISTORY
1. (b) High Revenue
Explanation:- All new land system failed due to high revenue
2. (c) Zamindars
Explanation: Under permanent settlement the rajahs were recognized as Zamindars.
3. (d) South India
Explanation: Munroe system was extended all over South India.
4. (a) 10 Million
Explanation: In Bengal famine, about 10 million people died.
5. (b) 2 ploughs
Explanation: For every one bigha of indigo cultivation they require 2 ploughs.
ANSWER TO ASSIGNMENT
DATE - 16-05-2020 CLASS – VIII SUBJECT - HISTORY
1. (b) 2
Explanation:- There are 2 main system of Indigo Cultivation.
2. (c) 18th century
Explanation: Indigo cultivation expanded rapidly in Bengal during 18th century.
3. (c) Both (a) & (b)
Explanation: The Mahalwari, Ryotwari, Zamindari are different system of Land Settlement
and Land Revenue.
4. (d)Heavy guns used by the infantry.
Explanation: Muskets refer to heavy guns used by infantry.
5. (a) 1830
Explanation: Rayanna, was caught and hanged by the British in 1830.
SUBJECT: GEOGRAPHY
DATE:11/5/2020 CLASS:8 SUB:GEOGRAPHY
1. D- Terraced agriculture
Explanation- Terraces are made on mountains to slow down the flow of rainwater and help to reduce soil erosion.
2. C- Pesticides
Explanation- Harmful chemicals are present in pesticides which led to soil erosion.
3. C- Pron to flooding
Explanation- During flood heavy flow of water washed away the soil therefore rock dams are made to stop soil erosion.
4. A- Exposed
Explanation- Grass roots hold the top soil but due to over grazing cause soil erosion.
5. A- Slow down the speed of the wind
Explanation- In coastal areas wind blows fastly and washed away the top soil therefore tall trees are planted to slow down the speed
DATE:12/5/2020
1. C- B-horizon
Explanation- Sub - soil is formed after weathered rock .
2. B- sheet erosion
Explanation- Sheet of top soil in hilly areas, washed away with the flow of water.
3. A- Soil fertility
Explanation- It helps to regain the fertility of the soil.
4. C- Lithospeheric zone
Explanation- It is the solid part of the earth and soil is only formed in this layer.
5. A- Layers
Explanation- Due to weathering of rocks, soil is fo3in layers and is not formed at a time.
ANSWERS TO ASSIGNMENT
DATE:13/5/2020
1. B-Decayed organic material
Explanation- Dead plants and animals are decomposed and converted into fertile material called humus.
2. B- (A-horizon )
Explanation- This zone carries fertile organic material called humus.
3. D-
Explanation- Humus is made up of plants and animals which contains the fertile organic material.
4. B- Horizon
5. A- Parent material
Explanation- soil is formed by weathering of rocks and are in layers.
DATE:14/5/2020
1. C- Leaching
Explanation- Due to heavy rainfall top soil washed away which contains the fertility of the soil.
2. All of the above
Explanation- Weathering, time and climate determine the soil type.
3. D- Soil conservation
Explanation- due to soil erosion soil become unfit for cultivation so it is necessary to conserve soil
4. C- Humus
Explanation- humus is made up of decayed plants and animals.
5. A- Splash erosion
Explanation- heavy rainfall easily washed away bare soil .
ANSWERS TO ASSIGNMENT
DATE:15/5/2020
1. D- (C-Horizon)
Explanation- above bed rocks this layer is formed after weathering .
2. C- Time
Explanation- soil is formed in layers therfore with the course of time the thickness will increase
3. B- over use of ground water
Explanation- to full fill the demand of water and food of growing popultion
4. A- Wind erosion
Explanation- In desert areas due to lack of vegetation, wind blows fastly and cause soil erosion.
5. B- contour ploughing
Explanation- In hilly areas ploughing is done along the contours of the land in order to minimize soil erosion.
DATE:16/5/2020
1. C- ( O- horizon )
Explanation- this is the top layer of the soil which contains humus.
2. D-types of weathering
Explanation- soil is formed in which depends upon speed and types of weathering.
3. A- weathered zone
Explanation- this is the first stage of soil formation.
4. D- wind erosion
Explanation- In desert and coastal areas, wind erosion is caused due to high speed winds
5. C- ( B-horizon)
Explanation- due to heavy rainfall top soil leached to sub soil/B-horizon as it is below A-
horizon.
वस्तुनिष्ठ प्रश्िों के उत्तर
दिि ांक--17-5-2020
Day 1
दिि ांक 11/5/2020
प्रश्ि 1-उत्तर क
भ ष के िो भेि होते हैं-- लिखित, मौखिक।
प्रश्ि 2-उत्तर घ
दहांिी भ ष को िेवि गरी लिपि में लििते हैं।
प्रश्ि 3-उत्तर ग
व्य करण को च र भ गों में ब ांटते हैं- उन्हें चरण कहते हैं।
प्रश्ि 4- उत्तर ि
जोड़ िहीां धरती िर इसक ।
प्रश्ि 5- उत्तर ि
करुण क अर्थ िय है।
Day 2
12/5/2020
प्रश्ि 1-उत्तर ि
पवघ्ि शब्ि क अर्थ िरेश निय ां य रुक वटें हैं।
प्रश्ि 2- उत्तर ग
ग ांजे मधुमय ग ि कभी रे्।
प्रश्ि 3- उत्तर क
भ रत म त हमें अन्ि,अमतृ िेती है।
प्रश्ि4- उत्तर क
पवहग क िय थयव ची शब्ि िक्षी है।
प्रश्ि 5-उत्तर ि
धरती क िय थयव ची शब्ि क्षक्षनत है।
Day 3
13/5/2020
प्रश्ि1- उत्तर ग
क्रय क पविोम शब्ि पवक्रय है।
प्रश्ि2- उत्तर क
अिुिस्स्र्त क पविोम शब्ि उिस्स्र्त है।
प्रश्ि3 उत्तर ि
अिुक ि क पविोम शब्ि प्रनतक ि है।
प्रश्ि 4 उत्तर क
उत्तीणथ क पविोम शब्ि अिुत्तीणथ है।
प्रश्ि 5 उत्तर ि
जड़ क पविोम शब्ि चेति है।
Day 4
14/5/2020
प्रश्ि1 उत्तर ि
किक क िय थयव ची शब्ि सोि है।
प्रश्ि 2-उत्तर क
नतलमर क िय थयव ची शब्ि अांधक र है।
प्रश्ि3--उत्तर ि
िैत्य क िय थयव ची शब्ि ि िव है।
प्रश्ि 4 उत्तर घ
अनतथर् क िय थयव ची शब्ि अभ्य गत है।
प्रश्ि 5 उत्तर घ
तरणी क िय थयव ची शब्ि िौक है।
Day 5
15/5/2020
प्रश्ि 1-उत्तर घ
अनतवसृ्ष्ट क पविोम शब्ि अि वसृ्ष्ट है।
प्रश्ि 2-उत्तर घ
उत्र् ि क पविोम शब्ि िति है।
प्रश्ि 3- उत्तर ि
अिुज क पविोम शब्ि अग्रज है।
प्रश्ि 4 उत्तर ग
िरतांत्र क पविोम शब्ि स्वतांत्र है।
प्रश्ि 5-उत्तर क
अमतृ क पविोम शब्ि पवष है।
Day 6
16/5/2020
प्रश्ि1- उत्तर क
मह ि शब्ि क भ वव चक सांज्ञ मह ित है।
प्रश्ि 2-उत्तर ग
करुण शब्ि क भ व व चक करुण है।
प्रश्ि 3-उत्तर ि
पवपवध क भ वव चक पवपवधत है।
प्रश्ि 4- उत्तर ग
म िव क भ वव चक म िवत है।
प्रश्ि 5; उत्तर घ
कििी शब्ि क अर्थ केि है।
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