Year 7 Module 3 Practice Paper

Transcription

1 Year 7 Module 3 Practice Paper Brockington College - Science minutes marks Page 1 of 37

2 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. 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. 4 marks Page 2 of 37

3 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 Why is an oak tree called a producer? Tick the correct box. It loses its leaves in autumn. It makes food by photosynthesis. Its flowers are tiny. Its leaves will not rot. Page 3 of 37

4 (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?... Explain your answer (c) There are no caterpillars on the oak tree in winter. Suggest a reason for this maximum 5 marks Page 4 of 37

5 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. (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 (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 Page 5 of 37

6 (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 marks maximum 5 marks Page 6 of 37

7 ## 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? Page 7 of 37

8 (b) Plants grow on the woodland floor. Explain why these plants grow bigger and faster when there is plenty of light marks (c) Respiration takes place in the cells of all plants. Complete the word equation for respiration. oxygen +... carbon dioxide 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 Page 8 of 37

9 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 (b) Sharna mixed the purple cabbage-water with some other liquids. She wrote the colours of the mixtures in a table as shown below. 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 Use the information in the table to answer parts (i) and 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?... Sharna then mixed cabbage-water with lemon juice. Lemon juice is acidic. What colour was the mixture?... (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 maximum 5 marks Page 9 of 37

10 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... 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. (b) Look at the graph above. What happened to the ph of the liquid in Barry's mouth as he ate the meal?... Page 10 of 37

11 (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 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.... the substance which is most alkaline.... Page 11 of 37

12 (b) Tick one box to describe Johnson s facial wash. 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?... 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.... Suggest the ph of the hydrochloric acid.... Page 12 of 37

13 (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 Winston continued to add crushed tablets to the acid until the mixture stopped fizzing. Why did the fizzing stop? (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 Page 13 of 37

14 (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? 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. On the dotted line, give the chemical formula of the other product. sodium + hydrochloric + hydroxide acid NaOH HCl NaCl... 2 marks Page 14 of 37

15 (b) In experiment 1, Molly put two beakers on a balance. 3 One contained 20 cm of hydrochloric acid. 3 The other contained 20 cm of sodium hydroxide solution. The total mass was g. She poured the acid onto the sodium hydroxide. They reacted. Why did the reading on the balance not change? (c) In experiment 2, Molly put two beakers on a balance. 3 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 Page 15 of 37

16 The total mass at the start was g. When the reaction stopped, the reading on the balance was g. Why was there a loss of mass in this reaction? 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 Page 16 of 37

17 (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. Mercury Venus Mars Jupiter Saturn Uranus 2 marks (c) The diagram shows a satellite in orbit around the Earth. not to scale (i) Give one use of a satellite Which force keeps the satellite in orbit around the Earth? Tick the correct box. gravity friction air resistance magnetism 2 marks maximum 6 marks Page 17 of 37

18 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 (b) (i) At what time of day is the Sun highest in the sky?... 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 (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 (d) Explain why the Sun seems to move across the sky Page 18 of 37

19 (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 Maximum 6 marks Page 19 of 37

20 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 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 Page 20 of 37

21 (i) From the diagram, what supports the idea that Pluto is a planet?... From the diagram, what supports the idea that Pluto is not a planet?... (b) The table below shows information about planets in our solar system. planet diameter (km) Mercury 4800 Venus Earth Mars 6800 Jupiter Saturn Uranus Neptune Pluto has a diameter of km. How does this information suggest to scientists that Pluto is not a planet?... (c) An object called Charon orbits Pluto. How does the presence of Charon support the idea that Pluto is a planet?... Page 21 of 37

22 (d) The table below shows the composition of the atmosphere of some of the objects in our solar system. object atmosphere Mercury Venus Earth Neptune Earth s moon Titan (a moon) Pluto none mainly carbon dioxide mainly nitrogen and oxygen hydrogen, helium and methane none nitrogen and methane nitrogen and methane Atmosphere is not used to classify objects as moons or planets. Use the information above to suggest a reason for this (e) Why do you think scientists found it difficult to decide how Pluto should be classified? 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 marks Page 22 of 37

23 The four moons are approximately the same distance from the Earth. However, they do not have the same brightness. Suggest one reason for this (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 Europa 3.6 Ganymede Callisto The graph was plotted using the information in the table. Use the graph to estimate Europa s distance from Jupiter.... millions of km Page 23 of 37

24 (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?... Maximum 5 marks Page 24 of 37

25 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) It makes food by photosynthesis. if more than one box is ticked, award no mark 1 (L4) Page 25 of 37

26 (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) Page 26 of 37

27 (b) fewer foxes or they decrease any one from 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 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) Page 27 of 37

28 (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) Page 28 of 37

29 (c) glucose water answers must be in the correct order 1 (L6) 1 (L6) [5] M5. (a) (i) filtration if more than one box is ticked, award no mark 1 (L3) chromatography if more than one box is ticked, award no mark 1 (L3) (b) (i) it is alkaline accept alkali 1 (L3) 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) 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) Page 29 of 37

30 (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 normal soap do not accept soap or ph (L5) 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 (L5) [4] M8. (a) (i) red or pink accept orange or yellow any number greater than 0 and smaller than 7 accept 0 1 (L5) 1 (L6) (b) (i) carbon dioxide is gas accept carbon dioxide or a gas is produced 1 (L5) 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) Page 30 of 37

31 (c) a compound a salt if more than two boxes are ticked, deduct one mark for each incorrect tick minimum mark zero 1 (L6) 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 H 2 O accept hydrogen oxide for water answers must be in the correct order 2 (L7) 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) Page 31 of 37

32 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) Sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune award one mark for the Sun in the correct position award one mark for both Earth and Neptune in the correct positions 2 (L3) Page 32 of 37

33 (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) 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 or twelve o clock 1.00 or one o clock or accept answers between and to allow for variations between local time and GMT or BST midday or noon do not accept lunch time 1 (L4) towards the south if more than one box is ticked, award no mark 1 (L4) (c) in the west if more than one box is ticked, award no mark 1 (L4) Page 33 of 37

34 (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] Page 34 of 37

35 M13. (a) (i) it orbits the Sun accept it goes round the Sun it has an orbit is insufficient 1 (L5) 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) Page 35 of 37

36 (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) 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 (L7) (c) the Sun planets both answers are required for the mark 1 (L6) [5] Page 36 of 37

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