Paper 1. Science test. First name. Last name. School. Pupil number KEY STAGE TIER

Transcription

1 Sc KEY STAGE 3 Science test Paper 1 TIER Please read this page, but do not open the booklet until your teacher tells you to start. Write your name and school in the spaces below. If you have been given a pupil number, write that also. First name Last name School Pupil number Remember The test is 1 hour long. You will need: pen, pencil, rubber, ruler, protractor and calculator. The test starts with easier questions. Try to answer all of the questions. Write all your answers on the test paper do not use any rough paper. Check your work carefully. Ask your teacher if you are not sure what to do. For marker s use only Total marks QCA/00/526 QCA, Key Stage 3 Team, 29 Bolton Street, London W1Y 7PD

2 1. The diagram shows an oak tree. (a) An oak tree takes in water and oxygen from the soil. Name one other type of substance an oak tree needs to take in from the soil. (b) The roots of an oak tree are long and split into many smaller roots. How does this help the tree to absorb water? (c) By the time winter comes, the oak tree has lost its leaves. Explain why this stops the growth of an oak tree. KS3/00/Sc/Tier 5-7/P1 2

3 (d) The drawing shows a caterpillar of a moth called the Oak Beauty. These caterpillars feed on oak leaves and woodland birds eat them. Describe how the appearance of the caterpillar can help it to survive. 2 marks maximum 5 marks KS3/00/Sc/Tier 5-7/P1 3 5

4 2. (a) Drinking large amounts of alcohol every day can damage the liver. The type of damage is called cirrhosis, and it can kill a person quickly. The graph below shows the number of people dying from cirrhosis of the liver, in Paris, between 1935 and P Q R S T number of people per dying from cirrhosis of the liver year (Data obtained from Key Science Biology, Applin; published by Stanley Thornes 1994) During which period of time, P, Q, R, S or T, was it difficult to get alcohol? (b) Alcohol is a drug. Which property makes alcohol a drug? Tick the correct box. It is soluble in water. It is a chemical. It can provide energy. It affects the nervous system. KS3/00/Sc/Tier 5-7/P1 4

5 (c) Look at the graph below. 15 times increased chance of accident 10 times 5 times 1 time amount of alcohol in the blood in mg/100 cm 3 (i) Using the graph, describe how increasing the amount of alcohol in the blood affects the chance of having an accident. 2 marks (ii) Which of the following statements could be used to explain why alcohol in the blood could cause accidents? Tick the correct box. Alcohol cools the body. Alcohol increases the time a person takes to react. Alcohol is a stimulant. Alcohol makes a person happy. maximum 5 marks KS3/00/Sc/Tier 5-7/P1 5 5

6 3. The drawings show some plant and animal cells. Each cell has a different function. A B C D E not to scale (a) Give the name of cell C. (b) The main functions of two of the cells are listed below. Write the letter of the correct cell next to each function. (i) photosynthesis 2 marks (ii) movement of mucus (c) (i) Give the name of the organ where cell E is produced. (ii) Give the name of the part of a plant where cell B is found. maximum 5 marks KS3/00/Sc/Tier 5-7/P1 6

7 4. Some roads are made of concrete. The concrete is laid in sections with small gaps between them. gap concrete section concrete section not to scale (a) (i) What happens to the size of most objects when they get hotter? (ii) When the temperature rises, what will happen to the gaps between the concrete sections? (iii) When the temperature rises, what might happen to the sections of concrete if there are no gaps between them? (b) The gaps between the concrete sections are filled with tar. The tar becomes soft when it is warm. Why is it important that the tar becomes soft? maximum 4 marks KS3/00/Sc/Tier 5-7/P1 7 9

8 5. (a) Sunil picked yellow, red and purple primula flowers from his garden. He dipped the different flower petals into water and into two different solutions. The ph of one solution was 1 and the ph of the other was 10. The table shows the results. colour of flower petals in solution of ph 1 in water ph 7 in solution of ph 10 yellow stayed yellow stayed yellow stayed yellow red stayed red stayed red turned green purple turned pink stayed purple turned blue Which colour of flower petal would be most useful to make an indicator for both acids and alkalis? Explain your answer. 2 marks Sunil crushed petals from each flower separately in some liquid and poured off the coloured solutions. Then he put drops of each coloured solution into the middle of different pieces of filter paper. KS3/00/Sc/Tier 5-7/P1 8

9 The solutions spread out on the filter paper. The diagrams show his results. solution from yellow petals yellow ring solution from red petals yellow ring solution from purple petals purple spot purple spot (b) What is the name of this method of investigating coloured substances? (c) Sunil made notes on his experiment. Some words are missing. Complete the sentences. When I crushed a flower in a liquid it produced a coloured solution. 3 marks This is because a coloured substance had in the liquid. This shows that the liquid is a for these coloured substances. My experiment shows that one of the flowers probably contained two coloured substances. This was the flower. maximum 6 marks KS3/00/Sc/Tier 5-7/P1 9 6

10 6. The table contains information about five metals, A, B, C, D and E. metal how it reacts with cold water how it reacts with hot water A no reaction extremely slowly B no reaction no reaction C hardly at all slowly D slowly quickly E quickly very violently (a) Use the information in the table to arrange the metals in order of reactivity. most reactive least reactive (b) (i) Which metal in the table could be copper? (ii) Which metal in the table could be sodium? (iii)which metal in the table could be iron? maximum 4 marks KS3/00/Sc/Tier 5-7/P1 10

11 7. Sophie places a coin at the bottom of an empty mug. She cannot see the coin with her eye in the position shown. eye coin (a) Sophie fills the mug with water. Her head is in the same position as before, but now she can see part of the coin. eye coin Draw a ray of light on the diagram to show how Sophie can see part of the coin. Use a ruler. Draw an arrow on the ray to show its direction. (b) Sophie pours some concentrated blackcurrant juice into the water. The blackcurrant drink acts like a red filter and makes the coin look red. Explain how a red filter works. 3 marks 2 marks maximum 5 marks KS3/00/Sc/Tier 5-7/P1 11 9

12 8. The drawing shows a boy with a bow and arrow. He is holding the arrow and pulling it back. string bow arrow (a) Two horizontal forces act on the arrow. These are the force exerted by the boy s hand and the force exerted by the string. The arrow is not moving. The boy pulls the arrow with a force of 150 N. What is the size of the force exerted by the string on the arrow? N (b) When the boy lets go of the arrow, it starts to move forward. Explain why it starts to move. (c) The arrow flies across a field and hits a target. Two forces act on the arrow while it is in the air. Air resistance acts in the opposite direction to the movement, and gravity acts downwards. These two forces cannot balance each other, even when they are the same size. Why is this? KS3/00/Sc/Tier 5-7/P1 12

13 (d) The arrow has a sharp pointed end. When the arrow hits the target, the sharp point exerts a very large pressure on the target. Why does a sharp pointed end exert a larger pressure than a blunt end? maximum 4 marks KS3/00/Sc/Tier 5-7/P1 13 4

14 9. The table below gives information about the planets of the Solar System. They are listed in alphabetical order. planet average time for time for distance diameter one orbit one rotation temperature on from the Sun in km round the on its axis surface of planet in million km Sun in hours in ºC Earth days Jupiter years Mars days Mercury days Neptune years Pluto years Saturn years Uranus years Venus days (Data obtained from The Guinness Book of Astronomy, Patrick Moore; published by Guinness 1992) (a) Explain why Neptune and Pluto are the coldest planets. (b) Explain why there could be no liquid water on the surface of: (i) Mars (ii) Venus KS3/00/Sc/Tier 5-7/P1 14

15 (c) On which planet would the time between sunrise and sunset be shortest? (d) Which planet has the shortest year? (e) Give the name of the force which keeps the planets in their orbits. maximum 6 marks KS3/00/Sc/Tier 5-7/P1 15 6

16 10. Bats are mammals that can fly. In many parts of the world bats live in caves. Many other animals live in the caves and some feed on bat droppings. Bats fly out of the caves at night to catch insects. The diagram shows part of a food web which includes the organisms living in a cave. fleas harvestmen cave spiders bats beetles millipedes springtails flies moths bat droppings in the cave flowering plants growing outside the cave (a) In summer, birds enter the caves and eat large numbers of beetles. Suggest why this might cause the population of millipedes to: (i) go up; (ii) go down. KS3/00/Sc/Tier 5-7/P1 16

17 (b) In the space below, draw a pyramid of numbers for the following food chain. flowering plants moths bats fleas maximum 3 marks KS3/00/Sc/Tier 5-7/P1 17 3

18 11. Sadie and Tom carried out an experiment to investigate the digestion of starch using an enzyme called amylase. mixture of enzyme and starch water bath at 25 C (a) Why was the mixture of enzyme and starch kept in a water bath? Sadie and Tom placed drops of iodine solution on a white tile. They know that starch will turn the iodine solution from brown to dark blue. Every 30 seconds they added a drop of the mixture of enzyme and starch to a drop of iodine solution on the tile. At first the drops turned blue, but after 240 s they stayed brown. (b) Why did the mixture stop turning the drops of iodine solution blue after 240 s? (c) They then carried out the experiment with the water bath at 35ºC. This time, the drops stopped turning blue after 120 s. How does raising the temperature from 25ºC to 35ºC affect the digestion of starch? KS3/00/Sc/Tier 5-7/P1 18

19 (d) Sadie and Tom want to compare the experiment at 35ºC with the results from the experiment at 25ºC. Describe what they need to do to make this a fair comparison. (e) A balanced diet includes all of the substances in the following list. starch fat fibre minerals protein vitamins (i) Give the names of the two substances in the list which are absorbed into the blood without being digested (ii) Which substance in the list passes through the body without being digested? maximum 6 marks KS3/00/Sc/Tier 5-7/P1 19 6

20 [Blank page] KS3/00/Sc/Tier 5-7/P1 20

21 12. The drawing shows the label on a box of fertiliser for houseplants. PLANT GROW NPK FERTILISER (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. (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. H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Ga Ge As Se Br Kr (i) (ii) The element N is nitrogen. What are the names of the other two elements? P K Give the symbol for the most reactive metal shown in this part of the Periodic Table. 2 marks maximum 4 marks KS3/00/Sc/Tier 5-7/P1 21 4

22 13. A group of pupils carried out an experiment with four different liquids. They wrapped paper tissues around the bulbs of four thermometers. They secured the tissues with rubber bands. Each thermometer was then dipped into a different liquid and removed. The temperature was recorded. The reading on each thermometer was then noted every two minutes. 2:00 paper tissue timer liquid thermometer dipped into liquid The results are given in the table below. time in min thermometer removed from liquid reading, in C, on the thermometer dipped in: propanone ethanol ether water (a) Suggest which liquid evaporated most rapidly. (b) After six minutes, the reading went up on the thermometer dipped in ether. Explain why. KS3/00/Sc/Tier 5-7/P1 22

23 (c) What is the likely temperature of the room in which they did the experiment? (d) The pupils carried out the experiment with propanone again. However, this time they did not wrap the thermometer in paper tissue but just dipped the glass bulb into the propanone and removed it. Suggest how their second set of results would be different. maximum 4 marks KS3/00/Sc/Tier 5-7/P1 23 4

24 14. A pupil wound a coil of copper wire around a glass tube and connected the wire to a battery. She placed a compass at each end of the tube and one compass beside the tube as shown. Y glass tube X (a) (i) (ii) Complete the diagram by drawing arrows in compasses X and Y to show the direction of the magnetic field. Draw an arrow in the middle of the glass tube to show the direction of the magnetic field in the glass tube. 2 marks (iii) When the switch is opened, in which direction will the three compass needles point? (b) Give one way to reverse the magnetic field around the glass tube. KS3/00/Sc/Tier 5-7/P1 24

25 (c) Two pieces of iron are placed inside the glass tube. (i) When the switch is closed, the magnetic field is the same as in the diagram opposite. The pieces of iron become magnetised. Label the four poles on the pieces of iron. glass tube (ii) When the switch was closed, the pieces of iron moved. Explain why they moved. maximum 7 marks KS3/00/Sc/Tier 5-7/P1 25 7

26 15. The diagram shows a simple tool for punching holes in a leather belt. pivot steel peg lightweight handle base hole in base piece of leather force applied not to scale When the handle is pressed down, the steel peg presses down on the piece of leather. If the force is large enough, the peg punches through the leather, making a hole. The diagram below shows the force applied to the handle. pivot 4 cm 10 cm steel peg 50N not to scale (a) Calculate the moment (turning effect) of the 50 N force applied to the handle. Give the units. 2 marks (b) This moment makes the steel peg press down on the leather. Calculate the force with which the steel peg presses down on the leather. N KS3/00/Sc/Tier 5-7/P1 26

27 (c) The next time the punch is used, the steel peg presses down on the leather with a force of 150 N. (i) The area of the end of the steel peg is 0.1 cm 2. What is the pressure of the steel peg on the leather? Give the units. 2 marks (ii) The pressure is too small, and the punch does not go through the leather. How could you change the design of the punch to make it work using the same force on the handle? maximum 6 marks KS3/00/Sc/Tier 5-7/P1 27 6

28 Qualifications and Curriculum Authority