Year 9 Science Exam Revision Questions

Transcription

1 Year 9 Science Exam Revision Questions Q1. The drawing below shows a barn owl. Barn owls hunt for small animals such as mice. (a) Look at the drawing of the barn owl. Give two ways the barn owl is suited for catching small animals Draw a line from each animal below to the word that describes it. Draw only two lines. 4 marks The photograph below shows two young barn owls. They are covered with soft feathers. Page 1

2 Why do the young barn owls need feathers? (c) Barn owls build nests in farm buildings. Mice eat wheat seeds. Many old farm buildings have been knocked down so that houses can be built on the farmland. Give one reason why this has caused the number of barn owls to decrease.... Suggest one reason why farmers like to have barn owls on their farms marks maximum 7 marks Q2. The drawings below show four living things found in a wood. Caterpillars eat oak leaves. Owls eat blackbirds. Blackbirds eat caterpillars. (a) Complete the food chain for these four living things. not to scale 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 2

3 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 Q3 The information below was taken from the label of a can of baked beans in tomato sauce. Page 3

4 (a) A healthy diet contains a number of groups of substances. The nutritional information lists some of these. Give one group of substances, needed for a healthy diet, which is missing from the nutritional information.... Which food, shown in the list of ingredients, provides the most protein in this can?... Give one reason why we need protein in our diet.... (c) Name one food, shown in the list of ingredients, which provides fibre.... Why is fibre needed for a balanced diet? Maximum 5 marks Q4. The diagram shows a section through the human female reproductive system. Page 4

5 (a) How often are eggs normally released in the female reproductive system? In which labelled part is an egg normally fertilised by a sperm?... Fill the two gaps in the sentences below. A fertilised egg divides into a tiny ball of cells called an embryo. The embryo attaches to the lining of the uterus. Here the embryo grows to become an unborn baby, called a.... It takes about... months for a baby to develop inside its mother. 2 marks (c) The diagram below shows a baby growing in its mother s uterus. Page 5

6 What is the function of the amniotic fluid? Through which part can harmful substances, such as nicotine, pass from the mother s blood to the baby s blood?... (iii) Give one other harmful substance which may be passed from the mother s blood to the baby s blood.... (d) When the baby is born it is pushed out of the mother s body. What happens in the wall of the uterus to push the baby out? Maximum 8 marks Q5. (a) Diagram 1 is a simplified drawing of bones and muscles in a left leg viewed from the outer side. Muscle A contracts. What effect does this have on the leg? Page 6

7 Muscles are found in antagonistic pairs. Write the letters of the pair of muscles which control the bending and straightening of the leg at the knee. (iii) When one muscle of an antagonistic pair contracts the other muscle does not relax completely, but maintains some tension. What is the advantage of maintaining tension in both muscles. Diagram 2 shows the elbow joint. Tissue X covers the ends of the bones at the joint. Give the name of tissue X.. Osteoarthritis is a very painful condition. In the joints of people with osteoarthritis small pieces of tissue X break off. Suggest two effects this could have on the joint. 2 marks (c) Tendons are shown in diagram 1 and ligaments are shown in diagram 2. Ligaments can stretch much more than tendons. Explain why ligaments at the elbow need to stretch. Explain why it is necessary that tendons hardly stretch at all when a muscle contracts. Maximum 8 marks Page 7

8 Q6. Michelle added some universal indicator solution to four liquids. Michelle uses the ph chart to fill in her table of results. ph chart ph colour red orange green blue purple (a) The table below shows some of Michelle s results. Complete Michelle s table of results below. Use the ph chart to help you. liquid colour of universal indicator solution ph milk green rain water 5 hydrochloric acid red bleach 11 2 marks Explain why using acids can be dangerous.... (c) Michelle measured the ph of some milk stored at room temperature for five days. The graph of Michelle s results is shown below. One of the axes has been labelled. Page 8

9 Write the axis label for the graph at X. Use the graph. How does the ph of the milk change over the five days?.. maximum 5 marks Q7. 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) 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. Page 9

10 Look at the graph above. What happened to the ph of the liquid in Barry's mouth as he ate the meal?... (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 Q8. The list below shows properties that different elements can have. magnetic can be compressed very high melting point very low melting point good conductor of heat poor conductor of heat good conductor of electricity poor conductor of electricity (a) Which two properties from the list above make aluminium suitable for saucepans? marks Which property in the list above explains why: copper is used in the cable of a television? a lot of oxygen gas can be pumped into a very small container? Maximum 4 marks Page 10

11 Q9. (a) The table below shows information about five elements. element melting point ( C) boiling point ( C) conducts electricity colour A 7 59 no brown B no colourless C yes silvery D no yellow E yes orange Which two of these elements are likely to be metals? Write the letters.... and... Which element in the table is liquid at room temperature? Write the letter.... What is the chemical symbol for copper? Tick the correct box. Cr Cu C Co Ca (c) How many atoms of iron and oxygen are there shown in the formulas for FeO and Fe 2O 3? Complete the table below. compound FeO number of atoms of iron number of atoms of oxygen Fe 2O 3 2 marks maximum 5 marks Page 11

12 Q10. (a) Methane can be a gas, a liquid or a solid. In the diagram below, arrows P, Q, R and S represent changes of state. The boxes on the right show the arrangement of particles of methane in the three different physical states. Each circle represents a particle of methane. Draw a line from each physical state of methane to the arrangement of particles in that physical state. Draw only three lines. Arrows P, Q, R and S represent changes of state. Which arrow represents: evaporation?... melting?... 2 marks Methane is the main compound in natural gas. The scale below shows the melting point and the boiling point of methane. Page 12

13 Methane has three physical states: solid, liquid and gas. What is the physical state of methane at 170 C?... The formula of methane is CH 4. The symbols for the two elements in methane are C and H. Give the names of these two elements. element C... element H... 2 marks (iii) When methane burns, it reacts with oxygen. One of the products is water, H 2O. Give the name of the other product.... Maximum 7 marks Q11. (a) The table below shows the melting points of four metals. metal melting point, in C gold 1064 mercury 37 sodium 98 iron 1540 Which metal in the table has the highest melting point?... Which metal in the table has the lowest melting point?... Gold can be a gas or a liquid or a solid. Choose from these words to fill the gaps below. When gold is heated from room temperature to 1070 C, the gold changes from a... to a.... Page 13

14 (c) 5 g of gold is melted and all of it is poured into a mould to make a pendant as shown below. What is the mass of the gold pendant?... g (d) The table below shows how the four metals react with oxygen when heated in air. metal gold mercury sodium iron reaction when heated in air no change slowly forms a red powder bursts into flames straight away very slowly turns black Which is the most reactive metal in the table?... Which is the least reactive metal in the table?... Maximum 6 marks Q12. Joanne added iron filings to copper sulphate solution. She observed the reaction after one week. Page 14

15 (a) What evidence in the diagrams shows that a chemical reaction has taken place?... The reaction between iron and copper sulphate is a displacement reaction. Give the name of the orange metal visible after one week.... What is the name of the compound formed in this reaction?... (iii) Joanne poured the green solution into another test tube. She added some copper pieces to the solution. Will a displacement reaction occur? yes no Explain your answer..... (c) Part of the reactivity series of metals is shown below. Use the information above. Which two metals would react with aluminium nitrate in a displacement reaction? Tick the two correct boxes. calcium potassium zinc lead maximum 5 marks Page 15

16 Q13. (a) Draw a line from each circuit symbol below to the correct name. Draw only four lines. circuit symbol name 3 marks Fred made circuit 1 as shown below. Give the name of the part that is the energy source for the circuit.... (c) Fred then made circuit 2 as shown below. Page 16

17 In the table below, tick a box to show whether circuit 1 and circuit 2 are series or parallel circuits. Tick only two boxes. series parallel circuit 1 circuit 2 (d) What metal is usually used for wires in electric circuits?... maximum 6 marks Q14. David put two bars of iron close to each other. There was no magnetic force between them. David recorded the result as shown below. (a) David did three other tests. Tick the correct box to show the result for each test. 1 mar Page 17

18 (iii) David then did two experiments with magnets. The tick in each box shows David s results in each experiment. Label the missing poles on each magnet to match David s results. Page 18

19 maximum 5 marks Q15. Alex makes an electromagnet. She winds insulated wire around an iron nail. She connects the wire to a power supply. She uses the electromagnet to pick up some steel paper-clips. This is her prediction. The more turns of wire around the iron nail the stronger the electromagnet becomes. (a) Give the one factor she should change as she investigates her prediction. Page 19

20 Give one factor she should keep the same. (iii) Describe how she could use the paper-clips to measure the strength of the electromagnet. Alex wrote a report of her investigation. What would an odd result suggest? (c) Which size paper-clips would Alex use to make her results more accurate? Tick the correct box. Give a reason for your choice. maximum 6 marks Page 20

21 Q16. Tom tries on four types of footwear in a sports shop. ski boot trainer ice skate walking boot (a) When Tom tries on the footwear, which one sinks into the carpet the most? When Tom tries on the footwear, what is the same for each type of footwear? Tick the correct box. the area of the footwear Tom s weight on the footwear the material of the footwear the weight of the footwear Page 21

22 The drawing below shows a snowshoe. How do snowshoes help people to walk in deep snow?... (c) Choose the correct word from the list to complete the sentence below. air resistance friction gravity magnetism When Tom is ice skating the force of... between the skate and the ice is less than when he is walking on a carpet. Maximum 4 marks Q17. James shone a ray of light at a mirror as shown below. diagram 1 He measured the angle of reflection for different angles of incidence. His results are shown below. angle of incidence (º) angle of reflection (º) Page 22

23 (a) Which angle of reflection was not measured accurately?... How can you tell this from the table? James set up a different experiment as shown below. diagram 2 He measured the angle of refraction for different angles of incidence. His results are shown in the graph. Page 23

24 Use the graph to answer the questions below. When the angle of refraction is 20, what is the angle of incidence?... What conclusion could James draw from his graph? Complete the sentence below. When light passes from air into glass, the angle of incidence is always... the angle of refraction. (c) On diagram 2, draw a line to continue the refracted ray as it leaves the glass block. maximum 4 marks Q18 The table below gives information about the planets of the Solar System. They are listed in alphabetical order. planet average distance from the Sun in million km diameter in km time for one orbit round the Sun time for one rotation on its axis in hours temperature on surface of planet in C 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 Page 24

25 Explain why there could be no liquid water on the surface of: Mars Venus (c) On which planet would the time between sunrise and sunset be shortest? (d) (e)... Which planet has the shortest year?... Give the name of the force which keeps the planets in their orbits.... Maximum 6 marks Page 25