year 7 module 3 practice paper - brockington college 7 module 3 practice paper brockington college -...

Year 7 Module 3 Practice Paper

Brockington College - Science

minutes

marks

of 37

Q1. The drawing shows a bird called a curlew. It feeds on small animals which live in mud by the sea. It lays spotted eggs in a nest on the ground.

Draw a line from each fact about the curlew to the way it helps the curlew to survive.

4 marks

fact about the curlew

the way it helps the curlew to survive

Its eggs are spotted. • • This helps the curlew to walk in shallow water.

Its beak is long and pointed.

• • This stops seagulls finding them.

Its legs are long. • • This stops the curlew sinking into the mud.

Its feet are wide. • • This helps the curlew get animals out of the mud.

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Q2. The drawings below show four living things found in a wood.

not to scale

• Caterpillars eat oak leaves. • Owls eat blackbirds. • Blackbirds eat caterpillars.

(a) (i) Complete the food chain for these four living things.

oak tree → ................................. → ................................. → .................................. 1 mark

(ii) Why is an oak tree called a producer? Tick the correct box.

1 mark

It loses its leaves in autumn.

It makes food by photosynthesis.

Its flowers are tiny. Its leaves will not rot.

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(b) On one oak tree, there were two types of caterpillar.

not to scale

All the caterpillars were eating the leaves. The number of gypsy moth caterpillars increased.

What happened to the number of orange-striped caterpillars?

...................................................................................................................... 1 mark

Explain your answer.

......................................................................................................................

...................................................................................................................... 1 mark

(c) There are no caterpillars on the oak tree in winter.

Suggest a reason for this.

......................................................................................................................

...................................................................................................................... 1 mark

maximum 5 marks

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Q3. The drawings show part of a farmland food chain.

not to scale

(a) A pyramid of numbers represents the number of organisms at each stage in a food chain.

On each line by the pyramid of numbers below, write the name of the correct organism from the food chain above.

1 mark

(b) Partridges feed mainly on insects and wild plants (weeds).

Some farmers spray their crops with chemicals to kill insects and weeds.

How would this affect the number of foxes?

.........................................................................................................................

Explain your answer.

.........................................................................................................................

......................................................................................................................... 1 mark

(c) Partridges build their nests on the ground among plants. They lay up to 18 eggs in the nest.

Suggest why partridges need to lay so many eggs.

.........................................................................................................................

......................................................................................................................... 1 mark

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(d) Some farmers leave a strip of land around the edge of each field which they do not spray with chemicals.

Suggest two reasons why this will lead to an increase in the number of partridges on these farms.

1 ......................................................................................................................

.........................................................................................................................

2 ......................................................................................................................

......................................................................................................................... 2 marks

maximum 5 marks

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##

The drawings below show the trees in a woodland area at the beginning of May and at the end of May.

beginning of May end of May

The graph below shows the amount of light reaching the top of the trees and the woodland floor over one year.

(a) Why does the amount of light reaching the woodland floor decrease during May?

........................................................................................................................

........................................................................................................................ 1 mark

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(b) Plants grow on the woodland floor.

Explain why these plants grow bigger and faster when there is plenty of light.

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................ 2 marks

(c) Respiration takes place in the cells of all plants.

Complete the word equation for respiration.

oxygen + ................................ carbon dioxide + ................................ 2 marks

maximum 5 marks

Q5. Sharna boiled some red cabbage in water. The cabbage-water turned purple.

(a) (i) Sharna separated pieces of cabbage from the cabbage-water.

Which method did she use? Tick the correct box.

chromatography filtration

condensation freezing 1 mark

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(ii) Sharna wanted to find out if the purple cabbage-water contained more than one coloured substance.

Which method did she use? Tick the correct box.

chromatography filtration

condensation freezing 1 mark

(b) Sharna mixed the purple cabbage-water with some other liquids. She wrote the colours of the mixtures in a table as shown below.

Use the information in the table to answer parts (i) and (ii) below.

(i) Sharna mixed cabbage-water with colourless washing-up liquid. The mixture turned blue.

What does this tell you about the washing-up liquid?

............................................................................................................... 1 mark

colour of cabbage-water mixed with liquid

Is the liquid acidic, alkaline or neutral?

liquid 1 red acidic

liquid 2 blue alkaline

liquid 3 purple neutral

(ii) Sharna then mixed cabbage-water with lemon juice. Lemon juice is acidic.

What colour was the mixture?

............................................................. 1 mark

(c) What is the name of a chemical which changes colour when it is mixed with acids or alkalis? Tick the correct box.

filtrate indicator

non-metal solution 1 mark

maximum 5 marks

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Q6. The pH scale shown below is used to measure how acidic or alkaline a solution is.

The graph below shows how the pH of the liquid in Barry's mouth changed as he ate a meal.

(a) (i) Use the graph to give the pH of the liquid in Barry's mouth before he started to eat.

pH .................. 1 mark

(ii) What does this pH tell you about the liquid in Barry's mouth before he started to eat?

Use the pH scale above to help you. Tick the correct box.

It was acidic. It was alkaline. It was colourless. It was neutral.

1 mark

(b) Look at the graph above. What happened to the pH of the liquid in Barry's mouth as he ate the meal?

..................................................................................................................... 1 mark

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(c) Barry chews special chewing gum after each meal. The chewing gum neutralises the liquid in his mouth.

What type of substance neutralises an acid? Tick the correct box.

an acid an alkali

an indicator a solid 1 mark

Maximum 4 marks

Q7. The chart is taken from a bottle of Johnson’s pH5.5 Facial Wash.

(a) From the information in the chart give:

(i) a substance which is almost neutral.

............................................................................................................. 1 mark

(ii) the substance which is most alkaline.

............................................................................................................. 1 mark

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(b) Tick one box to describe Johnson’s facial wash.

1 mark

It is very alkaline.

It is slightly alkaline.

It is neutral.

It is slightly acidic.

(c) A bee sting is acidic. Which one of the substances given in the chart would be best to neutralise the sting?

.................................................................................................................... 1 mark

Maximum 4 marks

Q8. Hydrochloric acid is a strong acid.

(a) Winston used universal indicator solution to find the pH of some hydrochloric acid.

(i) Suggest the colour of the mixture of universal indicator solution and the hydrochloric acid.

........................................................... 1 mark

(ii) Suggest the pH of the hydrochloric acid.

............... 1 mark

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(b) Indigestion can be caused when too much hydrochloric acid is produced in the stomach. Magnesium carbonate can be used to treat indigestion.

Winston crushed some indigestion tablets containing magnesium carbonate. He added them to hydrochloric acid in a test-tube. The mixture fizzed.

The word equation for the reaction is shown below.

magnesium + hydrochloric → magnesium + carbon + water carbonate acid chloride dioxide

(i) Use the word equation to explain why the mixture fizzed when the reaction took place.

.............................................................................................................

............................................................................................................. 1 mark

(ii) Winston continued to add crushed tablets to the acid until the mixture stopped fizzing. Why did the fizzing stop?

.............................................................................................................

............................................................................................................. 1 mark

(c) When magnesium carbonate reacts with hydrochloric acid, magnesium chloride is formed.

Which two words describe magnesium chloride? Tick the two correct boxes.

a compound a mixture

an element a salt

a metal a solvent 2 marks

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(d) It is important that the hydrochloric acid in the stomach is not completely neutralised by indigestion tablets.

Why is hydrochloric acid needed in the stomach?

.....................................................................................................................

..................................................................................................................... 1 mark

maximum 7 marks

Q9. (a) The chemical formula for hydrochloric acid is HCl. The chemical formula for sodium hydroxide is NaOH.

When they react together, two products are formed. The chemical formula for one product is NaCl.

(i) Complete the word equation below with the names of both products. 1 mark

(ii) On the dotted line, give the chemical formula of the other product.

sodium + hydrochloric _______________ + _______________ hydroxide acid NaOH HCl NaCl ...............

2 marks

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(b) In experiment 1, Molly put two beakers on a balance.

One contained 20 cm of hydrochloric acid.

The other contained 20 cm of sodium hydroxide solution. The total mass was 163.5 g.

She poured the acid onto the sodium hydroxide. They reacted.

Why did the reading on the balance not change?

........................................................................................................................

........................................................................................................................ 1 mark

(c) In experiment 2, Molly put two beakers on a balance.

One contained 20 cm of hydrochloric acid.

The other contained 5 g of sodium carbonate.

She poured the acid onto the sodium carbonate. They reacted. Two of the products are the same as in experiment 1.

(i) Complete the word equation with the names of the three products.

sodium + hydrochloric → .......................... + .......................... + .......................... carbonate acid

1 mark

3

3

3

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(ii) The total mass at the start was 149.0 g. When the reaction stopped, the reading on the balance was 147.0 g.

Why was there a loss of mass in this reaction?

...............................................................................................................

............................................................................................................... 1 mark

maximum 6 marks

Q10. (a) Sita made a model of three parts of the solar system, the Sun, Earth and Moon. She used a marble, a torch and a tennis ball.

Draw a line from each part of the solar system to the object she used.

Draw only three lines.

2 marks

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(b) The table below shows the order of some of the planets in our solar system.

Complete the table to show the positions of the Earth, Neptune and the Sun.

2 marks

Mercury Venus Mars Jupiter Saturn Uranus

(c) The diagram shows a satellite in orbit around the Earth.

not to scale

(i) Give one use of a satellite.

...................................................................................................................

...................................................................................................................

(ii) Which force keeps the satellite in orbit around the Earth? Tick the correct box.

gravity friction

air resistance magnetism 2 marks

maximum 6 marks

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Q11. David lives in Britain. He sees that the Sun seems to move across the sky.

(a) Where does the Sun rise in the morning? Tick the correct box.

in the north in the south

in the west in the east 1 mark

(b) (i) At what time of day is the Sun highest in the sky?

............................................................................................................ 1 mark

(ii) In which direction will David see the Sun when it is highest in the sky? Tick the correct box.

towards the north towards the south

towards the west towards the east 1 mark

(c) Where does the Sun set in the evening? Tick the correct box.

in the north in the south

in the west in the east 1 mark

(d) Explain why the Sun seems to move across the sky.

.....................................................................................................................

..................................................................................................................... 1 mark

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(e) Light from the Sun takes about 8 minutes to get to the Earth.

How long does light from other stars take to get to the Earth? Tick the correct box.

more than 8 minutes

8 minutes

less than 8 minutes

zero minutes 1 mark

Maximum 6 marks

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Q12. Each of the observations shown below has one explanation.

Draw a line from each observation to the correct explanation.

maximum 4 marks

Q13. Pluto was discovered in 1930. It was classified as a planet. In 2006, scientists agreed that Pluto is not a planet.

(a) The diagram below shows our solar system.

not to scale

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(i) From the diagram, what supports the idea that Pluto is a planet?

............................................................................................................... 1 mark

(ii) From the diagram, what supports the idea that Pluto is not a planet?

............................................................................................................... 1 mark

(b) The table below shows information about planets in our solar system.

Pluto has a diameter of 2 300 km. How does this information suggest to scientists that Pluto is not a planet?

........................................................................................................................ 1 mark

planet diameter (km)

Mercury 4800

Venus 12200

Earth 12800

Mars 6800

Jupiter 142600

Saturn 120200

Uranus 49000

Neptune 50000

(c) An object called Charon orbits Pluto.

How does the presence of Charon support the idea that Pluto is a planet?

........................................................................................................................ 1 mark

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(d) The table below shows the composition of the atmosphere of some of the objects in our solar system.

Atmosphere is not used to classify objects as moons or planets. Use the information above to suggest a reason for this.

........................................................................................................................

........................................................................................................................ 1 mark

object atmosphere

Mercury none

Venus mainly carbon dioxide

Earth mainly nitrogen and oxygen

Neptune hydrogen, helium and methane

Earth’s moon none

Titan (a moon) nitrogen and methane

Pluto nitrogen and methane

(e) Why do you think scientists found it difficult to decide how Pluto should be classified?

........................................................................................................................

........................................................................................................................ 1 mark

maximum 6 marks

Q14. In 1610, the Italian scientist, Galileo, observed four bright moons near Jupiter. Each night the moons moved.

(a) (i) The Sun and stars are light sources, and the planets are seen by reflected light. Explain how we can see the moons of Jupiter.

.............................................................................................................

.............................................................................................................

.............................................................................................................

............................................................................................................. 2 marks

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(ii) The four moons are approximately the same distance from the Earth. However, they do not have the same brightness. Suggest one reason for this.

.............................................................................................................

............................................................................................................. 1 mark

(b) The table shows the distances of the four moons from the centre of Jupiter, and the times of their orbits. Europa’s distance has been left out.

name of moon

distance from Jupiter, in

millions of km

time for one orbit, in

Earth days

Ιo 0.42 1.8

Europa 3.6

Ganymede 1.07 7.2

Callisto 1.88 16.7

The graph was plotted using the information in the table.

Use the graph to estimate Europa’s distance from Jupiter.

............................................................................................ millions of km 1 mark

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(c) Galileo realised that Jupiter and its moons formed a model of our Solar System. In this model:

what did Jupiter represent? .........................................................................

what did the moons represent? ................................................................... 1 mark

Maximum 5 marks

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M1.

(L3)

if more than four lines are drawn, deduct one mark for each incorrectly drawn line minimum mark zero

[4]

M2. (a) (i) oak tree → caterpillar → blackbird → owl

all three answers are required for the mark 1 (L4)

(ii) It makes food by photosynthesis. if more than one box is ticked, award no mark

1 (L4)

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(b) either

• decreased or went down 1 (L3)

any one from

• fewer leaves to feed on

• gypsy moth caterpillars ate most of the leaves accept ‘gypsy moth caterpillars ate the leaves’ accept ‘the gypsy moth caterpillars ate all the leaves or all the food’

• less food accept ‘no food’ accept ‘they were competing for food’

1 (L4)

or

any one from

• increased or went up

• stayed the same 1 (L3)

any one from

• they had enough food or leaves

• more eggs hatched 1 (L4)

(c) the tree loses its leaves accept ‘no leaves’ or ‘no food’; accept ‘it is too cold’ accept ‘caterpillars change into pupae or chrysalises or moths’ do not accept ‘caterpillars hibernate in winter’

1 (L4) [5]

M3. (a) •

answers must be in the correct order all three answers are required for the mark

1 (L5)

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(b) • fewer foxes or they decrease

accept ‘there would be less’ accept ‘they would drop or go down’ both the answer and the correct explanation are required for the mark credit both correct answers written in the same space ‘foxes die’ is insufficient

any one from

• fewer partridges (for foxes to eat)

• the poison gets into the food chain

• they move elsewhere to find food accept ‘less food’ accept ‘partridges would be poisoned’ accept ‘some die of starvation’ do not accept ‘the chemicals poison the foxes’ do not accept ‘they all die of starvation’ do not accept ‘they have nothing to eat’

1 (L6)

(c) any one from

• greater chance of survival

• more would survive accept ‘the more eggs they lay the more partridges there will be’ accept ‘some eggs will be damaged or eaten’ accept ‘some eggs will not hatch’ accept ‘young partridges or chicks may be eaten or trampled on or die’ accept ‘so they will not become extinct or die out’ ‘partridges will die’ is insufficient

1 (L6)

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(d) any two from

• there would be a greater variety of plants

• more plants or weeds

• more insects

• more nesting places

• more cover

• the partridges are not poisoned accept ‘there would be plants to eat’ accept ‘there would be insects to eat’ accept ‘protection from predators’ accept ‘more food’ or ‘they would have food’ or ‘partridges will come to feed’ if none of the first three marking points are given do not accept ‘they had not been sprayed with chemicals’

2 (L5) [5]

M4. (a) • leaves are bigger

accept ‘there are leaves or a canopy’ accept ‘leaves open or grow’ ‘trees block the light’ is insufficient

1 (L5)

(b) any two from

• light is needed for photosynthesis accept ‘photosynthesis’

• more (photosynthesis) accept, for two marks, ‘the rate or amount of photosynthesis increases if the light increases’

• light provides energy for growth ‘they need light to grow’ is insufficient ‘light is a source of food’ is insufficient

• biomass or food or sugar or starch or carbohydrate is produced 2 (L6)

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(c) • glucose 1 (L6)

• water answers must be in the correct order

1 (L6) [5]

M5. (a) (i) filtration

if more than one box is ticked, award no mark 1 (L3)

(ii) chromatography if more than one box is ticked, award no mark

1 (L3)

(b) (i) it is alkaline accept ‘alkali’

1 (L3)

(ii) red 1 (L3)

(c) indicator if more than one box is ticked, award no mark

1 (L4) [5]

M6. (a) (i) 7

do not accept ‘neutral’ 1 (L3)

(ii) it was neutral if more than one box is ticked, award no mark consequential marking applies accept ‘it was acidic’ if the answer to part (i) was less than 7 accept ‘it was alkaline’ if the answer to part (i) was greater than 7 and up to 14

1 (L4)

(b) any one from

• it decreased or went down

accept ‘it dropped to 5’

• it became acidic or more acidic 1 (L3)

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(c) an alkali if more than one box is ticked, award no mark

1 (L4) [4]

M7. (a) (i) any one from

• soap with moisturisers do not accept ‘soap’ or ‘pH 7.3’

• normal facial wash 1 (L5)

(ii) normal soap do not accept ‘soap’ or ‘pH 10.0’

1 (L5)

(b) It is slightly acidic. if more than one box is ticked award no mark

1 (L5)

(c) normal soap do not accept ‘soap’ or pH 10.0’

1 (L5) [4]

M8. (a) (i) red or pink

accept ‘orange’ or ‘yellow’ 1 (L5)

(ii) any number greater than 0 and smaller than 7 accept ‘0’

1 (L6)

(b) (i) carbon dioxide is gas accept ‘carbon dioxide or a gas is produced’

1 (L5)

(ii) any one from

• no more carbon dioxide or gas was produced

• the reaction stopped

• all the hydrochloric acid was used up accept ‘the acid had been neutralised’ do not accept ‘all the magnesium carbonate was used up’

• there was an excess of magnesium carbonate or carbonate 1 (L6)

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(c) a compound 1 (L6)

a salt if more than two boxes are ticked, deduct one mark for each incorrect tick minimum mark zero

1 (L6)

(d) any one from

• without it digestion would stop or slow down

accept ‘to break down food’

• acid is needed for digestion

• the enzymes only work in acid conditions or at a low pH

• it is needed to kill bacteria or microbes

do not accept ‘germs’ 1 (L6)

[7]

M9. (a) (i) • sodium chloride + • water

accept ‘hydrogen oxide’ for water answers must be in the correct order

2 (L7)

(ii) • H2O

1 (L7)

(b) any one from

• the same atoms are present in the reactants and the products accept ‘mass is conserved’ ‘the mass did not change’ is insufficient ‘the particles are the same’ is insufficient do not accept ‘the molecules are the same’

• no gas was given off accept ‘nothing was added or lost’

1 (L7)

(c) (i) • sodium chloride carbon dioxide water

answers may be in any order all three answers are required for the mark

1 (L7)

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(ii) any one from

• carbon dioxide or gas escapes

‘mass is lost’ is insufficient as it is given in the question

• carbon dioxide is a gas

• one of the products is a gas or escapes 1 (L7)

[6]

M10. (a) •

if all three lines are correct, award two marks if one or two lines are correct, award one mark if more than one line is drawn from any part of the solar system, award no credit for that part

2 (L3)

(b) •

award one mark for the Sun in the correct position award one mark for both Earth and Neptune in the correct positions

2 (L3)

Sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune

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(c) (i) any one from

• weather forecasting accept ‘weather’

• communications accept ‘phone’ or ‘fax’

• telescopes

• global positioning system accept ‘GPS’

• TV

• spying accept ‘taking photographs’

• internet 1 (L4)

(ii) • gravity if more than one box is ticked, award no mark

1 (L4) [6]

M11. (a) in the east

if more than one box is ticked, award no mark 1 (L4)

(b) (i) any one from

• 12.00 or twelve o’clock

• 1.00 or one o’clock or 13.00

accept answers between 11.50 and 13.30 to allow for variations between local time and GMT or BST

• midday or noon

do not accept ‘lunch time’ 1 (L4)

(ii) towards the south if more than one box is ticked, award no mark

1 (L4)

(c) in the west 1 (L4)

if more than one box is ticked, award no mark

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(d) any one from

• because the Earth rotates or spins

accept ‘because the Earth moves round or goes round or spins and moves’

• because the Earth turns around its axis do not accept ‘because the Earth moves’ or ‘because the Earth goes round the Sun’

1 (L4)

(e) more than 8 minutes if more than one box is ticked, award no mark

1 (L4) [6]

M12.

if more than one line is drawn from an observation, award no mark for that observation

4 (L5) [4]

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M13. (a) (i) it orbits the Sun

accept ‘it goes round the Sun’ ‘it has an orbit’ is insufficient

1 (L5)

(ii) any one from

• it is not in the same plane as the other planets

• the orbit is out of line or at a different angle

accept ‘it is not in line with the others’ ‘it has a different orbit’ is insufficient accept ‘the orbit or it is tilted’ do not accept ‘it is too small’ as this is not shown in the diagram

1 (L6)

(b) any one from

• it has the smallest diameter accept ‘it is too small’ ‘it is very small’ is insufficient

• all the other planets are bigger 1 (L6)

(c) any one from

• Charon is a moon or satellite

accept ‘it is a moon’

• other planets have moons accept ‘the Earth or Saturn has a moon’ ‘Charon orbits Pluto’ is insufficient accept ‘moons do not orbit other moons’ accept ‘other planets have objects orbiting them’

1 (L6)

(d) any one from

• both planets and moons have atmospheres accept ‘Venus has an atmosphere and Mercury does not’

• whether or not it has an atmosphere does not make it a planet

• there is no pattern in the atmospheres accept ‘Earth’s moon does not have an atmosphere and Titan does’

• some planets do not have atmospheres accept ‘Titan has an atmosphere and so does Neptune’

1 (L6)

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(e) any one from

• scientists cannot decide on what a planet is

• if Pluto is a planet there could be more planets orbiting our Sun or in our solar system

• there is evidence for and against Pluto being a planet accept specific arguments for and against e.g. ‘it goes around the Sun but it is too small’ ‘there are reasons for and against’ is insufficient ‘it has an atmosphere like the Moon but orbits the Sun’ is insufficient as atmosphere is not sufficient to classify moons or planets

1 (L6) [6]

M14. (a) (i) any two from

• light from the Sun do not accept ‘light from the Sun and stars’

• reflected from the moons’ surfaces do not accept ‘the Sun reflects off the surface’

• travels from the moons to the eyes accept ‘they reflect sunlight’ for both marks

2 (L6)

(ii) any one from

• they reflect different amounts of light accept ‘they have different albedos’ accept ‘some are dark’ or ‘they are different colours’

• they are not the same size accept ‘one could be partly in the shadow of Jupiter or another moon’

1 (L7)

(b) 0.68 the unit is not required for the mark accept answers from 0.65 to 0.70

1 (L7)

(c) the Sun planets

both answers are required for the mark 1 (L6)

[5]

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year 7 module 3 practice paper - brockington college 7 module 3 practice paper brockington college -...

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