265362 ks3 sc t5-7 paper2 covercrossfield.co.uk/doc/2005_sc_3_5-7_paper2.pdf · 1ai 1 mark 1aii 1...
TRANSCRIPT
Sc
2005
Science test
Paper 2
Please read this page, but do not open the booklet until your
teacher tells you to start. Write your name and the name of
your school in the spaces below.
First name
Last name
School
Remember
■ The test is 1 hour long.
■ You will need: pen, pencil, rubber, ruler, protractor andcalculator.
■ The test starts with easier questions.
■ Try to answer all of the questions.
■ The number of marks available for each question is givenbelow the mark boxes in the margin. You should not writein this margin.
■ If you are asked to plan an investigation, there will bespace for you to write down your thoughts and ideas.
■ Do not use any rough paper.
■ Check your work carefully.
■ Ask your teacher if you are not sure what to do.
For marker’suse only Total marks
Borderline check
KEY STAGE
3TIER
5–7
QCA/05/1420
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1. The drawing below shows a garden water feature. It is solar-powered.
The solar cell absorbs energy from the Sun.
The solar cell is connected to a motor in the bowl.
The motor drives a pump.
Water is pumped up to the jug and it flows back down to the bowl.
(a) Use the information above to help you to complete the
following sentences.
Choose words from the list.
(i) The useful energy change in the solar cell is from
light to ____________________ energy.
(ii) The useful energy change in the motor is from
electrical energy to ____________________ energy.
(iii) As the water flows from the jug to the bowl ____________________
energy is changed into ____________________ energy.
KS3/05/Sc/Tier 5-7/P2 2
jug
bowl
pipe from pumpto jug
motorandpump
wires to motor
solar cell
chemical electricalgravitational
potential
light sound thermal
kinetic
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(b) Give one advantage and one disadvantage of using a solar cell to
power the water feature.
advantage _______________________________________________
___________________________________________________________
disadvantage _____________________________________________
___________________________________________________________
maximum 6 marks
KS3/05/Sc/Tier 5-7/P2 3
Total
6
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2a
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2a
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2. Lorna built the circuit drawn below. All the bulbs are identical.
(a) Complete the table below by writing on or off for each bulb.
One has been done for you.
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switch bulb
S1 S2 A B C D
open open off off off off
open closed
closed open
closed closed
S1
S2
A B C
D
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(b) Lorna then built a different circuit as shown below.
How could Lorna get both bulbs to light at the same time in this circuit?
___________________________________________________________
___________________________________________________________
maximum 4 marks
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Total
4
E
F
S3
S4
S5
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3. (a) (i) Air contains nitrogen.
In the box below draw five circles, , to show the arrangement
of particles in nitrogen gas.
(ii) Zeena carries a personal emergency alarm.
It uses nitrogen gas to produce a very loud sound.
The nitrogen gas in the container is under much higher pressure
than the nitrogen gas in the air.
How does the arrangement of nitrogen particles change when the
gas is under higher pressure?
________________________________________________________
________________________________________________________
(b) Use words from the boxes below to complete the sentence.
The rate at which the nitrogen particles hit the inside of the container
is ____________________ the rate at which nitrogen particles hit the
outside of the container.
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greater than less than the same as
lid
diaphragmcylindercontainingnitrogen gasunder highpressure
PERSONAL EMERGENCYALARM
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(c) Zeena pushes the lid down and nitrogen gas escapes through the
diaphragm.
The diaphragm vibrates and produces a sound.
The pattern on the oscilloscope screen below represents the soundwave
produced by the alarm.
(i) The loudness of the sound produced by the alarm decreases between
X and Y.
How can you tell this from the graph?
________________________________________________________
________________________________________________________
(ii) The pitch of the sound produced by the alarm stays the same between
X and Y.
How can you tell this from the graph?
________________________________________________________
________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 7
Total
5
X
Y
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4. Molly used a pH sensor to test different liquids. She dipped the probe of the
sensor into each liquid and recorded the pH value in a table.
(a) In the table below, tick one box for each liquid to show whether it is
acidic, neutral or alkaline. One has been done for you.
(b) Between each test Molly dipped the probe into distilled water.
(i) Why did she do this?
________________________________________________________
________________________________________________________
(ii) Which other liquid in the table could Molly use between tests to
have the same effect as distilled water?
________________________________________________________
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probe
liquid pH value acidic neutral alkaline
alcohol 7
dilute hydrochloric acid 2 ✓
distilled water 7
vinegar 3
sodium hydroxide solution 11
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(c) Molly put a piece of magnesium into a test-tube containing 20 cm3 of
vinegar. She put another piece of magnesium into a test-tube containing
20 cm3 of dilute hydrochloric acid.
(i) Molly thought that magnesium would react more vigorously with
hydrochloric acid than with vinegar.
What information in the table made Molly think this?
________________________________________________________
________________________________________________________
(ii) How would Molly be able to tell if a more vigorous reaction took place
with hydrochloric acid than with vinegar?
________________________________________________________
________________________________________________________
(d) (i) Complete the word equation for the reaction between magnesium
and hydrochloric acid.
magnesium + hydrochloric → __________________ + __________________
acid
(ii) After some time this reaction stopped. Why did the reaction stop?
________________________________________________________
________________________________________________________
maximum 9 marks
KS3/05/Sc/Tier 5-7/P2 9
Total
9
vinegar
magnesium
dilutehydrochloricacid
magnesium
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5a
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5b
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5. Two groups of pupils investigated the factors affecting the time taken for an
indigestion tablet to dissolve in 100 cm3 of water.
Group 1 recorded their results in the table below.
results of group 1
(a) What factor did group 1 change as they carried out their investigation?
___________________________________________________________
(b) Before the investigation, group 1 made a prediction.
They found this prediction was supported by the results in the table.
What prediction did group 1 make?
___________________________________________________________
___________________________________________________________
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tablettime taken to
dissolve (s)
whole tablet 34
broken tablet 28
finely crushed tablet 22
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(c) Group 2 investigated how the temperature of the water affects the time
taken for a whole tablet to dissolve.
Here are their results.
results of group 2
What factor did group 2 change as they carried out their investigation?
___________________________________________________________
___________________________________________________________
(d) What pattern do the results recorded by group 2 show?
___________________________________________________________
___________________________________________________________
(e) Look at the results presented by group 1 and group 2.
Both groups used the same type of tablet.
Estimate the temperature of water used by group 1.
_______°C
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 11
Total
5
temperature of water (oC) time taken to dissolve (s)
65 24
40 35
15 90
5 100
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6a
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6b
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6. (a) When fertilisation takes place, the nucleus of a sperm joins with the
nucleus of an ovum (egg).
In which part of the reproductive system does fertilisation normally
take place in humans?
Tick the correct box.
(b) The table below gives information about fertilisation in three animals.
Frogs release their eggs and sperm into water.
The eggs are fertilised in the water.
Why is it an advantage for frogs to release large numbers of eggs and
sperm?
___________________________________________________________
___________________________________________________________
KS3/05/Sc/Tier 5-7/P2 12
animalDoes fertilisation take place
inside or outside the body?
number of eggs
released at a time
human inside 1
bird inside 4
frog outside 3000
cervix ovary
oviduct uterus
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(c) The diagram shows a section through a fertilised egg of a bird.
(i) The shell of a bird’s egg is porous. This means it has microscopic
holes in it.
Why does it need to be porous?
________________________________________________________
(ii) Give one other function of the egg shell.
________________________________________________________
(d) A bird’s egg contains yolk which is a food store for the developing chick.
A human egg does not contain yolk.
Why does a human egg not need to contain a food store for the embryo?
___________________________________________________________
___________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 13
Total
5
embryoyolk
air space
shell
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7. (a) The diagram shows a group of cells from the lining of the mouth.
(i) Give the name and function of part P.
name of part P
________________________________________________________
function of part P
________________________________________________________
________________________________________________________
(ii) Which word describes this group of cells?
Tick the correct box.
KS3/05/Sc/Tier 5-7/P2 14
P
compound organism organ tissue
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(b) The diagram below shows muscle cells from the wall of the human
intestine.
(i) Muscle cells can contract.
Give one reason why muscles are needed in the intestine.
________________________________________________________
________________________________________________________
(ii) Other cells in the intestine produce enzymes.
What effect do enzymes in the intestine have on nutrients such as
protein?
________________________________________________________
________________________________________________________
(iii) Which of the following is required in the diet to keep food moving
through the intestine?
Tick the correct box.
maximum 6 marks
KS3/05/Sc/Tier 5-7/P2 15
Total
6
fat fibre
protein starch
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8a
1 mark
8. Suzi investigated how temperature affects the number of bubbles produced
by waterweed in one minute.
She set up the experiment as shown below.
When the temperature of the water was 10°C the waterweed did not
produce bubbles.
(a) Suzi increased the temperature of the water in the water-bath to 20°C.
The waterweed started to produce bubbles.
She waited two minutes before starting to count the bubbles.
Explain why she waited for two minutes before she started to count the
bubbles.
___________________________________________________________
___________________________________________________________
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(b) Suzi counted the number of bubbles produced at six different
temperatures.
Her results are shown on the graph below.
(i) Draw a smooth curve on the graph.
(ii) Use your curve to find the temperature of water which produced the
most bubbles per minute.
_______°C
(c) Suzi predicted that the higher the temperature the more bubbles would
be produced.
Which points on the graph support Suzi’s prediction?
___________________________________________________________
(d) Suzi’s data does not show clearly the exact temperature at which most
bubbles were produced.
How could she improve the data she collects to find this temperature?
___________________________________________________________
___________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 17
Total
5
15
10
5
0 0 10 20 30 40 50 60 70
temperature of water-bath (oC)
number ofbubblesproduced(per minute)
20
A
B
C D
E
F
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9. A reed switch is made of two iron strips inside a glass tube.
The iron strips close together when a magnet is brought near.
They spring apart again when the magnet is removed.
(a) Hilary set up the circuit shown below.
She tried to close the reed switch using an electromagnet.
She closed switch E but the electromagnet was not strong enough to
close the reed switch.
(i) Give two ways Hilary could increase the strength of the electromagnet.
1. ___________________________________________________
2. ___________________________________________________
KS3/05/Sc/Tier 5-7/P2 18
N S
iron core
E
glass tube
iron strip
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(ii) Hilary increased the strength of the electromagnet.
The reed switch closed.
The iron strips were magnetised as shown below.
She reversed the current in the coil of the electromagnet.
On the diagram below, label the poles of the iron strips when the
current was reversed.
(b) (i) Iron and steel are both magnetic materials.
Explain why the strips must be made of iron and not steel.
________________________________________________________
________________________________________________________
(ii) She replaced the reed switch with a piece of copper wire.
The current through the bulb increased.
Explain why more current flowed through the bulb when the
reed switch was replaced with copper wire.
________________________________________________________
________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 19
Total
5
S
S N
N
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10. John used an electrical heater to heat a cup of water. He kept stirring the
water. When the temperature reached 20°C, he started his stopwatch and
measured the temperature of the water every half minute.
He switched off the heater after 4 minutes, but continued to record the
temperature.
His results are shown in the table.
One measurement is missing and another appears to be wrong.
KS3/05/Sc/Tier 5-7/P2 20
time (minutes) temperature (°C)
0.0 20
0.5 26
1.0 31
1.5 36
2.0 41
2.5 46
3.0
3.5 57
4.0 56
4.5 58
5.0 59
5.5 59
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(a) Use the results in the table to draw a graph on the grid.
Label the axes.
Plot the points and draw a smooth curve of best fit.
(b) From your curve, estimate the temperature of the water after three
minutes.
_______°C
maximum 5 marks
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Total
5
( )
( )
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11a
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11b
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11b
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11. Part of the reactivity series of metals is shown below.
most reactive potassium
sodium
magnesium
aluminium
iron
lead
least reactive copper
(a) Dan added a piece of magnesium to a solution of copper sulphate.
A displacement reaction took place.
The word equation for the reaction is shown below.
magnesium + copper sulphate → magnesium sulphate + copper
Why is this called a displacement reaction?
___________________________________________________________
___________________________________________________________
(b) Look at each pair of chemicals in the table below.
Use the reactivity series to predict whether a displacement reaction
would take place.
Write yes or no in the second column and give the reason for your
decision.
KS3/05/Sc/Tier 5-7/P2 22
pairs of chemicals
Does a displacement
reaction take place?
yes or no
reason
iron + sodium chloride
magnesium + lead nitrate
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(c) Dan wanted to find out where zinc should be placed in the reactivity
series.
(i) What tests should Dan do to find the correct position of zinc in the
reactivity series?
________________________________________________________
________________________________________________________
________________________________________________________
(ii) How would Dan use his test results to decide where to put zinc in
the reactivity series?
________________________________________________________
________________________________________________________
________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 23
Total
5
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12a
1 mark
12a
1 mark
12b
1 mark
12. As apples become ripe they produce a gas called ethene.
Ethene passes through the air from ripe apples to unripe apples.
Ethene causes unripe apples to ripen more quickly.
(a) Three effects of ethene on apples are listed below.
• The green substance, chlorophyll, breaks down.
• Starch breaks down to form glucose.
• Pectin, a substance which holds cells together, breaks down.
Describe and explain the changes you would notice when apples
become ripe as a result of any two of these effects.
1. change ________________________________________________
_________________________________________________________
explanation ____________________________________________
_________________________________________________________
2. change ________________________________________________
_________________________________________________________
explanation ____________________________________________
_________________________________________________________
(b) Give the name of the process by which gases such as ethene spread
through the air in a room.
________________________________
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(c) The diagram below represents a molecule of ethene.
Ethene is flammable and must be kept away from naked flames.
Look at the diagram of the molecule of ethene.
Give the name and chemical formula of the two compounds formed when
ethene burns in oxygen.
1. name
______________________________________________________
formula
_______
2. name
______________________________________________________
formula
_______
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 25
Total
5
H
H
H
H
CC
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13. The table shows how hydrogencarbonate indicator solution changes colour
when the concentration of carbon dioxide in it changes.
Sunil set up the experiment shown below and put both test-tubes on a
window-sill.
Use information in the table to help you answer the questions below.
(a) The indicator in test-tube A changed from orange to yellow.
(i) What process, in the cells of the maggots, caused this colour change?
________________________________________________________
(ii) Explain what happens in this process to cause the colour change.
________________________________________________________
________________________________________________________
(b) The indicator in test-tube B changed from orange to purple.
(i) What process, in the cells of the leaves, caused this colour change?
________________________________________________________
(ii) Explain what happens in this process to cause the colour change.
________________________________________________________
________________________________________________________
KS3/05/Sc/Tier 5-7/P2 26
concentration of carbon dioxide colour change
increases orange to yellow
decreases orange to purple
maggots onwire mesh
leaves onwire mesh
orangehydrogencarbonate
indicator
test-tube A test-tube B
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13c
1 mark
(c) Sunil then put two fresh leaves into test-tube C containing 30 cm3 of
orange hydrogencarbonate indicator.
He added some maggots on a piece of wire mesh as shown below.
He put the test-tube on a window-sill.
The indicator remained orange. Explain why.
___________________________________________________________
___________________________________________________________
___________________________________________________________
maximum 5 marks
KS3/05/Sc/Tier 5-7/P2 27
Total
5
hydrogencarbonateindicator
leavesmaggots
test-tube C
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14b
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14. Read the magazine cutting about research into heart disease.
(a) Why can the results of this research not be used to draw any
conclusions about heart disease amongst women across the world?
___________________________________________________________
___________________________________________________________
(b) Give one reason why the data collected in this study is likely to be
reliable.
___________________________________________________________
___________________________________________________________
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14c
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14c
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14c
1 mark
(c) After reading the magazine cutting, pupils wrote the ideas below.
Decide if each idea is supported by information in the cutting.
Tick the correct box.
Use the information in the cutting as evidence to justify your decision in
the third column.
maximum 5 marks
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Total
5
Idea
Is the idea supported by
evidence?
Tick the correct box.
Use the information in the
magazine cutting as evidence
to justify your decision.
One in five of all British
females show signs of
heart disease.
Earlier treatment for
heart disease must have
been more effective than
modern medicines.
Four out of five British
women in the 60-79 age
group showed no signs
of heart disease.
Yes No
Yes No
Yes No
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