ks3 science test paper 1 levels 5-7 2004

8/11/2019 Ks3 Science Test Paper 1 Levels 5-7 2004

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Ks3 science test paper 1 levels 5-72004

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1. A. 4 and a half hours 3.4-3.6

B. It dulls the senses of Speech taste and smell. It increases the time taken to react

C. small intestines 1mark

D. liver 1mark

E. the foetus will not be able to have enough oxygen to breath so it will die. 1mark

2. A. To see if the heart beat increase or decrease.. 1mark

B. when he takes cola, his heart beat increases . 1mark

C. she is saying the effect of what cola can do to heartbeat. Yasmins conclusion describes

how it affected his heart rate while Harrys just says it affected his heart rate

D.? * drinking fizzy water would be a control; it would enable them to see whether

Fizziness or sparkling drinks would have an effect; * it would allow them to see if carbon

dioxide or carbonation has an effect

3. A.Chlorophyll root hair

B.? * they prevent insects or flies from crawling out; * insects slide in; * they make it

difficult for them to crawl out

C.? the more insects there are or food there is the more bacteria there will be

D1. Carbon Dioxide+ water=glucose+oxygen 2marks

D2. To provide energy 1mark

4.

A1. carbon dioxide

Because the number of drops of alkali to neutralise it to green is 160 drops and came from

green to red. it took more or most alkali to neutralise it or to change the colour of the

indicator back to green 1mark

A2. Air

Because the element did not have any change of colour on the Ph. 1markA3. It neutralizes the acidity or alkalinity. 1mark

B. hydrochloric acid+ zinc=zinc chlorine+hydrogen 2marks

5.

A1. A mixture. 1mark

A2. A compound. 1mark

A3. It has more atomic mass than the liquid. 1mark

B. the spirit was an acid and the paint was acid so it neutralized into colourless liquid. it is

insoluble in water; * water is not a solvent for the paint; * it dissolves in white spirit; * white

spirit is a solvent for the paint


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6. A1. c B

A2. 30 degrees 54-56 Degrees

A3. Point a=liquid solid

Point d=gas liquid

b. conduction

c. * the boiling point of water is less than that of stearic acid

* water could not transfer enough energy

* the maximum temperature of water is 100C

* it cannot get hot enough

7. A1. A and D A and F

A2. B A

A3. D EB1. Gravitational force 1mark

B2. Friction 1mark

C When the car hits the bumper at F, its kinetic energy is transferred into sound energy and

light energy 1mark

8.

cannot be done

a. requires drawing

b. it has more current passing through it * A has 3 V across it and B and C have 1.5 V

across them * A has twice the voltage of B or * because it is directly connected to

the supply

c. a letter S in any part of the circuit before it branches (requires drawing)

9. A1. A and D A and C

A2. B 1mark

B.? not all the light is reflected * some of the light is refracted * some of the light is

absorbed * light is scattered by the glass

10.A1. Cannot be done. Requires drawing

A2? each animal eats lots of the organism below it in the food chain

* DDT is not easily excreted

* DDT is not broken down

Bi? Through the placenta

ii in milk


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11.A1. 60cm3 1000

ii any three from

* she was using her muscles more

* she needed more energy

* her rate of respiration increased

* more oxygen was used up

* more carbon dioxide was produced

Bi it became faster

ii any one from

* the breaths are closer together

* there are more breaths in 10 s

12.Ai A

ii E

iii C

B any one from

* a compound contains two or more elements chemically combined or bonded

* a mixture contains two or more elements or compounds or substances not

chemically combined or bonded

Ci any one from * name: oxygen formula: O2

* name: hydrogen formula: H2

* name: nitrogen formula: N2

* name: chlorine formula: Cl2

Cii any one from

* name: carbon dioxide formula: CO2

* name: water formula: H2O* name: sulphur dioxide formula: SO2

* name: nitrogen dioxide or nitrogen oxide formula: NO2

13.A. ? * CO2 + * CaO

Bi sulphur dioxide

Bii calcium sulphate + carbon dioxide

14.

? *modified and unmodified plants

* the number of days or weeks or months the flowers stayed fresh


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any one from

* modified and unmodified plants should be the same variety

* conditions under which flowers are kept should be the same

* modified and unmodified plants should be the same starting age

A suitable time span (which will allow comparison)

for example

* until they have all wilted

or

* until all ordinary plants have wilted

15 A1. 1.5M x 50N = 75 MOMENTS 1mark

A2. 75 moments divided by 0.1M =50N Nm

B. when the circuit is broken, the barrier stays upright, however if the circuit is closed, the

moment of the side with a metal that can be an electromagnet and the other side is

stationary, so it rises up.

any one from

* a current flows in the coil

* the coil or the iron core becomes magnetised

ks3 science test paper 1 levels 5-7 2004

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