Year 9 Module 2 Practice Paper

Transcription

1 Year 9 Module 2 Practice Paper Science Department minutes marks This test represents the work taught to all students, and as such may be in parts above/below the appropriate level for any one individual; the practice paper represents the content taught, and not explicitly the questions that may be on the real test. Page of 28

2 Q. Some pupils put three identical trays of young plants in a greenhouse. They gave the plants a little water each morning with a sprinkler. The drawing shows the plants three weeks later. (a) (i) Why did some of the plants in trays A and C not grow as well as the plants in tray B? How would you move tray A to find out if your answer to part (i) is correct? What result would you expect? marks (b) The sprinkler adds water to the soil. What else could the pupils add to the soil to help the plants to grow well? Page 2 of 28

3 (c) At the same time, the pupils grew another tray of the same type of plants. They put the tray in a dark cupboard and kept the soil damp. After three weeks, how were the plants grown in the dark different from the plants grown in the greenhouse? Tick two boxes. The plants grown in the dark had: larger leaves longer stems more leaves paler leaves more roots 2 marks Maximum 6 marks Q2. Codling moths lay eggs on apple trees. The caterpillars of the codling moth feed on apples. The diagram below shows the life cycle of codling moths. not to scale Page 3 of 28

4 Apple growers use special traps to catch male codling moths. The traps contain a chemical which female moths produce to attract male moths. (a) (i) Explain why trapping male moths may result in fewer caterpillars the next year. Some apple growers spray their trees with insecticide to kill moths. Other apple growers disagree with this method of control. Suggest two reasons for not using insecticides marks (b) The female moth lays large numbers of eggs. Suggest why this is necessary..... (c) When the caterpillars are fully grown, they crawl into tiny spaces under the bark of the trees. The caterpillars stay under the bark during the winter and then change into pupae. (i) Suggest why more caterpillars and pupae survive when they are under the bark. Page 4 of 28

5 Some apple growers wrap bands of folded cardboard around the trunks of apple trees, as shown below. Caterpillars crawl into the folds. The cardboard is removed during the winter and destroyed. Suggest one way in which this helps to protect the next year s apples from damage by caterpillars of codling moths. Maximum 6 marks Q3. The drawing shows the label on a box of fertiliser for houseplants. (a) To maintain healthy growth of their potted plants, people have to keep adding fertiliser to the soil. Explain why they need to keep adding fertiliser. Page 5 of 28

6 (b) Part of the Periodic Table is shown below. The three elements N, P and K shown on the fertiliser label are also shown in the table. (i) The element N is nitrogen. What are the names of the other two elements? P... K... 2 marks Give the symbol for the most reactive metal shown in this part of the Periodic Table.... Maximum 4 marks Q4. The drawing shows a bottle garden which is kept in a brightly lit room. The cork in the neck of the bottle is not taken out. Page 6 of 28

7 (a) The plants in the bottle use oxygen for respiration. Explain why, over a week, the amounts of oxygen and carbon dioxide in the bottle stay about the same. 3 marks (b) Cross-pollination is the transfer of pollen from one plant to another. Give two reasons why cross-pollination is less likely to happen in this bottle garden than in an outdoor garden marks (c) Micro-organisms in the soil break down the dead parts of plants. This releases minerals such as nitrates. Nitrates are a source of nitrogen for living plants. Why does a plant need nitrogen to grow? Maximum 6 marks Page 7 of 28

8 Q5. The diagram shows a key which can be used to identify different chemicals. (a) Use the key to identify chemicals A, B and C. (i) Chemical A is a white powder. It fizzes when dilute hydrochloric acid is added. It dissolves in cold water. Chemical A is... Chemical B is a green powder. It does not fizz when dilute hydrochloric acid is added Chemical B is... (iii) Chemical C is a white powder. It does not fizz when dilute hydrochloric acid is added. It is insoluble in cold water. Chemical C is... Page 8 of 28

9 (b) Nickel carbonate is green. It is the nickel that makes nickel carbonate green, not the carbonate. Explain, using information from the key, how you know that this is true. 2 marks Maximum 5 marks Q6. A science teacher showed her class three experiments, A, B and C. The experiments and the word equations for the reactions that took place are shown below. All the experiments were done in a fume cupboard. Page 9 of 28

10 (a) From the substances in experiments A, B and C, above, give the name of: (i) one metallic element;... one non-metallic element;... (iii) two compounds.... and... (b) In experiment B, the iron filings weighed 2.0 g at the beginning of the experiment and the iron sulphide produced weighed 2.8 g. Explain this increase in mass (c) Complete the word equation for the chemical reaction in experiment C. copper + chlorine?... maximum 5 marks Page 0 of 28

11 Q7. The words contains added iron were printed on Colin s box of cereal. (a) Colin decided to test the cereal to see if it contained tiny pieces of powdered iron metal. First he crushed 500 g of cereal into a fine powder and mixed it with water. He put a clean, white, plastic-coated magnet in the mixture. Then he stirred it. If the cereal contains tiny pieces of iron metal, what should Colin expect to see? (b) Colin finds that the cereal does contain pieces of powdered iron. Give two differences between iron metal and compounds containing iron marks (c) Colin eats some cereal. The tiny pieces of iron metal in the cereal react with the hydrochloric acid in his stomach. Complete the word equation to show the reaction of iron with hydrochloric acid. iron + hydrochloric acid marks (d) The body needs iron to make red blood cells. The red blood cells transport oxygen to all the cells of the body. People who do not have enough red blood cells may feel that they do not have much energy. Explain why. 2 marks Maximum 7 marks Page of 28

12 Q8. The table gives information about solutions of three different salts in water. (a) Which two solutions when mixed together could form a neutral solution?... and... (b) Sodium hydrogensulphate solution behaves like an acid. (i) Magnesium is added to a solution of sodium hydrogensulphate. What would you expect to see forming on the magnesium?... Sodium carbonate is added to a solution of sodium hydrogensulphate. What gas would you expect to be formed?... (c) The formula for a different carbonate compound is K 2 CO 3. Give the names of the three elements which make up this compound Maximum 4 marks Q9. The picture shows a man called Aristotle. He lived in Greece over 2000 years ago. Page 2 of 28

13 Aristotle said that the heavier an object is, the faster it will fall to the ground. (a) The drawings below show a bowling ball, a cricket ball and a ping-pong ball. Lila dropped them all at the same time from the same height. bowling ball cricket ball ping-pong mass = g mass = 60 g mass = 2.5 g If Aristotle was correct, which of the three balls would you expect to reach the ground first? Give the reason for your answer (b) Joe said that it would be a fairer test if Lila had only used a cricket ball and a hollow plastic ball as shown below. cricket ball mass = 60 g hollow plastic ball mass = 56 g Why was Joe correct? (c) About 400 years ago in Italy, a man called Galileo had a different idea. He said that all objects dropped from the same height would reach the ground at the same time. (i) Lila dropped a hammer and a feather at the same time from the same height. Page 3 of 28

14 If Galileo was correct, which, if either, would reach the ground first?... Gravity acts on both the hammer and the feather as they fall. Give the name of one other force which acts on them as they fall.... (iii) An astronaut on the moon dropped a hammer and a feather at the same time from the same height. How would the results of the astronaut s experiment on the Moon be different from Lila s experiment on the Earth?... Explain your answer marks Maximum 6 marks ## In a storm, a small ship was blown onto a beach. Now it is calm and there is no wind. A tugboat is trying to pull the ship off the beach. Page 4 of 28

15 (a) The tugboat pulls the ship with a force of N. The ship does not move because of the force of friction acting on it. (i) Tick one box to show the size of the frictional force acting on the ship. zero more than zero but less than N N more than N Add an arrow to the drawing to show the direction of the frictional force acting on the ship. (b) When the tide is higher, the tugboat again pulls the ship with a steady force of N. The ship begins to move. Once the ship is off the beach, the tugboat continues to pull the ship with a force of N. A frictional force due to the water acts on the ship. (i) At first, the speed of the ship increases. Tick one box to describe the frictional force acting on the ship while its speed is increasing. zero more than zero but less than N N more than N Page 5 of 28

16 After a short while, the ship reaches a steady speed. The tugboat continues to pull with a force of N. Tick one box to describe the frictional force acting on the ship while it is going at a steady speed. zero more than zero but less than N N more than N (iii) The ship is towed to the north. What is the direction of the frictional force acting on the ship?... Maximum 5 marks Q. A remote-controlled car was timed over a period of 0 seconds. A graph of distance against time is shown below. Page 6 of 28

17 (a) Describe the motion of the car between: (i) 2 seconds and 6 seconds;... 9 seconds and 0 seconds.... (b) Calculate the average speed of the car between 0 and 0 seconds. Give the unit marks (c) The diagram below shows two of the forces acting on the car when it is moving. (i) When the motor was switched off, the car slowed down and then stopped. While the car was slowing down, which of the following was true? Tick the correct box. Friction was zero and the forward force was greater than zero. The forward force was zero and friction was greater than zero. Friction was zero and the forward force was zero. The forward force and friction were both greater than zero. Page 7 of 28

18 Use the graph to find the time when the car started to slow down. The car started to slow down after... s. Maximum 6 marks Page 8 of 28

19 M. (a) (i) they received less water accept the plants in tray B got more water do not accept they got less light The first mark is for describing how tray A could be moved. The second mark is for predicting that the plants now being watered would grow more quickly. any one from turn it around swap it with tray B accept move it into the middle swap with tray C without turning it round accept swap it with tray C the plants being watered would grow more quickly accept the plants in the water would grow faster or the plants in the middle would grow better if the first point was turn it around or swap it with tray C then accept the smaller plants would grow more quickly or the bigger plant would grow more slowly if the first point was swap it with tray B then accept all the plants in tray A would grow quickly or the same (b) fertiliser accept nutrients or nitrates or minerals or manure or plant food or trade names for fertilisers do not accept food (c) longer stems paler leaves if more than two boxes are ticked, deduct one mark for each incorrectly ticked box minimum mark zero [6] Page 9 of 28

20 M2. (a) (i) Answers must refer to mating or breeding or reproduction. any one from fewer males to mate do not accept there are no males to mate or there are fewer males fewer moths to breed do not accept fewer moths accept there will be fewer eggs (L5) any two from insecticide might enter food chains other useful or harmless insects might be killed accept other insects or bees might be killed do not accept other animals are killed predators of pests might be killed people might eat the insecticide accept people might be poisoned accept people might breathe it in accept so that the apples are organic 2 (L6) (b) any one from some eggs or caterpillars or pupae or moths accept caterpillars get eaten may be eaten some might not hatch some might die accept so that as many as possible survive (L5) (c) (i) any one from they cannot be seen by predators or birds accept they are not eaten or to hide accept a named predator such as blue-tit for shelter accept to keep warm to protect them from the cold accept to protect them (L5) Page 20 of 28

21 any one from caterpillars are removed or killed accept pupae can be removed or killed accept there are fewer pupae fewer pupae change into moths fewer moths produce caterpillars there will be fewer caterpillars to eat the apples (L6) [6] M3. (a) answers should convey the idea that fertilisers are needed to replace the nutrients used up by the plants any one from as the plant grows, nutrients are used up to replace the nutrients or minerals used by the plant do not accept soil in the pot contains a limited amount of nutrients (b) (i) P: phosphorus K: potassium K do not accept potassium [4] M4. Answers may be in any order (a) oxygen is produced during photosynthesis accept oxygen produced by plants is used by bacteria do not accept oxygen is produced by the plants carbon dioxide is used up during photosynthesis carbon dioxide is produced during respiration accept carbon dioxide is produced when bacteria or micro-organisms respire Page 2 of 28

22 Answers may be in either order (b) insects can t enter to transfer pollen accept there are no insects there is no wind in the bottle to transfer the pollen accept there is no wind accept there might be only one of each type of plant in the bottle (c) to make protein accept to make amino acids or for chlorophyll or for enzymes [6] M5. (a) (i) sodium carbonate (L4) (iii) nickel sulphate calcium sulphate (L4) (L4) (b) both nickel compounds are green (L5) the other carbonate compounds are not green answers may be in either order accept nickel sulphate is green accept the converse accept calcium carbonate is white or sodium carbonate is white (L5) [5] M6. (a) (i) any one from iron copper accept calcium (L5) Page 22 of 28

23 any one from sulphur chlorine accept oxygen or carbon (L5) (iii) any two from calcium carbonate calcium oxide carbon dioxide iron sulphide accept copper chloride answers may be in either order both answers are required for the mark (L6) (b) any one from the iron reacted or combined with sulphur accept the iron gained sulphur or sulphur was added to the iron accept the iron has joined with the sulphur do not accept iron has mixed with the sulphur do not accept sulphur or iron added a new layer the sulphur had mass accept the sulphur weighed 0.8 g (L6) (c) copper chloride (L6) [5] M7. (a) pieces of iron sticking to the magnet accept the iron powder attracting the magnet or pieces of a dark or grey powder on the magnet do not accept dark pieces in the powder Page 23 of 28

24 (b) A comparison must be made or implied for each mark to be awarded any two from the metal is magnetic or many iron compounds are not magnetic accept iron compounds are non-magnetic the metal is an element or in iron compounds, iron is chemically joined to other elements accept iron is an element or compounds contain different elements joined together do not accept iron metal is pure or the compounds contain iron plus something else do not accept in compounds the atoms are joined together in molecules iron metal is grey or shiny or compounds containing iron are green or brown iron is a good electrical conductor or iron compounds are electrical insulators accept iron is a conductor or iron conducts electricity or iron compounds are insulators iron is a good thermal conductor or iron compounds are poor thermal conductors accept iron conducts heat or iron compounds are thermal insulators the metal is not soluble in water or many iron compounds are soluble in water accept iron compounds are soluble iron can rust or iron compounds cannot rust in iron metal, all the atoms have the same number of protons accept in iron metal, all the atoms are the same 2 (c) iron chloride + hydrogen products may be in either order accept FeCl2 for iron chloride ignore references to oxidation states accept H2 for hydrogen 2 Page 24 of 28

25 (d) Answers may be in either order less oxygen is carried to the cells accept oxygen is needed for respiration or,cells cannot get enough oxygen or not enough oxygen going around the body less energy released in respiration accept not enough energy from respiration [7] M8. (a) ammonium chloride and sodium sulphite answers may be in either order both are required for the mark accept sulphate for sulphite accept 4 and 0 (L7) (b) (i) bubbles accept hydrogen or gas or fizzing do not accept a reaction (L7) carbon dioxide or CO 2 (L7) (c) potassium carbon oxygen answers may be in any order all three are required for the mark (L7) [4] M9. (a) Both the correct ball and the correct reason are required for the mark. the bowling ball because it has the greatest mass or it is the heaviest do not accept because it is bigger the bowling ball because it is bigger insufficient (L5) (b) any one from they are the same diameter accept they are the same size they produce the same air resistance or friction (L5) Page 25 of 28

26 (c) (i) they would both reach the ground at the same time (L5) (iii) air resistance accept friction either the feather and the hammer landed at the same time there is no atmosphere or air resistance or air on the moon or they would take longer to fall on the moon (L5) (L6) (L6) (L6) because there is lower gravity than on the Earth do not accept there is no gravity on the moon (L6) [6] M0. (a) (i) N if more than one box is ticked, award no mark (L5) an arrow pointing in the opposite direction to pull of the tow-rope as shown below the arrow parallel to the tugboat may be drawn anywhere on the diagram do not accept a horizontal arrow (L5) (b) (i) more than zero but less than N if more than one box is ticked award no mark N if more than one box is ticked, award no mark (L6) (L6) Page 26 of 28

27 (iii) any one from south or southwards in the opposite direction to the movement or pull away from tugboat accept opposing motion or backwards (L5) [5] M. (a) (i) constant speed or steady speed accept not accelerating (L7) stationary or not moving or stopped accept steady speed of zero do not accept it has a steady speed (L7) (b).8 accept (L7) m/s accept metres per second or ms do not accept mps (L7) (c) (i) The forward force was zero and friction was greater than zero. if more than one box is ticked, award no mark (L7) 6 accept answers from 5.8 to 6.2 (L7) [6] Page 27 of 28

28 Page 28 of 28