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KS3 science test 5-7 2000 Paper 1

 

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.

 

1 mark

(b)   The roots of an oak tree are long and split into many smaller roots.

       How does this help the tree to absorb water?

     

1 mark

 

(c)   By the time winter comes, the oak tree has lost its leaves. Explain why this stops the growth of an oak tree.

     

1 mark

 

(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

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 1965.

                 During which period of time, P, Q, R, S or T, was it difficult to get alcohol? 

1 mark

       (b)      Alcohol is a drug.  Which property makes alcohol a drug?

                 Choose  the correct sentence: .

       (c)      Look at the graph below.

       (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?

                 Choose the correct sentence: .

3.    The drawings show some plant and animal cells. Each cell has a different function.

       (a)      Give the name of cell C.

                   

1 mark

 

       (b)      The main functions of two of the cells are listed below.

                 Choose the letter of the correct cell next to each function.

2 marks

                 (i) photosynthesis 

 

                 (ii) movement of mucus  

 

       (c)      (i) Give the name of the organ where cell E is produced.

               

1 mark

 

                 (ii) Give the name of the part of a plant where cell B is found.

               

1 mark

 

maximum 5 marks

 

4.    Some roads are made of concrete. The concrete is laid in sections with small gaps between them.

       (a)      (i) What happens to the size of most objects when they get hotter?

               

1 mark

 

                 (ii)      When the temperature rises, what will happen to the gaps between the concrete sections?

1 mark

 

                 (iii)     When the temperature rises, what might happen to the sections of concrete if there are no gaps between them?

               

1 mark

 

       (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?

                  

1 mark

 

maximum 4 marks

 

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.

                 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.

 

       The solutions spread out on the filter paper. The diagrams show his results.

       (b)      What is the name of this method of investigating coloured substances?

                 

1 mark

 

       (c)      Sunil made notes on his experiment. Some words are missing. Complete the sentences.

3 marks

 

                 When I crushed a flower in a liquid it produced a coloured solution.

                 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

 

6.    The table contains information about five metals, A, B, C, D and E.

       (a)      Use the information in the table to arrange the metals in order of reactivity.

1 mark  

Most reactive
Least reactive

       (b)      (i)       Which metal in the table could be copper?             1 mark

                 (ii)       Which metal in the table could be sodium?            1 mark

                 (iii)      Which metal in the table could be iron?                 1 mark

 

maximum 4 marks

 

7.    Sophie places a coin at the bottom of an empty mug. She cannot see the coin with her eye in the position shown.

       (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.

                 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.

 

3 marks

 

       (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.

                         

2 marks

 

maximum 5 marks

 

 

 

8.    The drawing shows a boy with a bow and arrow. He is holding the arrow and pulling it back.

       (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

1 mark 

 

       (b)      When the boy lets go of the arrow, it starts to move forward. Explain why it starts to move.

                 

1 mark

 

       (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?

    

1 mark

 

 

       (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?

                 

1 mark

 

 

9.    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 oC

Earth

150

13 000

365 days

24

+22

Jupiter

780

140 000

12 years

9.8

-150

Mars

230

6800

687 days

25

-23

Mercury

58

4900

88 days

1400

+350

Neptune

4500

51 000

165 years

16

-220

Pluto

5900

2300

248 years

150

-220

Saturn

1400

120 000

29 years

10.2

-180

Uranus

2900

51 000

84 years

17

-210

Venus

110

12 000

225 days

5800

+480

 

(Data obtained from The Guinness Book of Astronomy, Patrick Moore; published by Guinness 1992)

 

       (a)      Explain why Neptune and Pluto are the coldest planets.

                 

1 mark

 

       b)       Explain why there could be no liquid water on the surface of:

                 (i) Mars     

                  

1 mark

                 (ii) Venus    

               

1 mark

 

       (c)      On which planet would the time between sunrise and sunset be shortest?

               

1 mark

 

       (d)      Which planet has the shortest year?

               

  1 mark

 

       (e)      Give the name of the force, which keeps the planets in their orbits.

                 

1 mark

 

 

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.

 

       (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;

                 

1 mark

                 (ii)      go down.

        

1 mark

 

       (b)      Draw a pyramid of numbers for the following food chain

1 mark

flowering plants    moths   bats  fleas

 

11.   Sadie and Tom carried out an experiment to investigate the digestion of starch using an enzyme called amylase.

       (a)      Why was the mixture of enzyme and starch kept in a water bath?

       

1 mark

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?

     

1 mark

 

       (c)      They then carried out the experiment with the water bath at 35oC. This time, the drops stopped turning blue after 120s. How does raising the temperature from 25oC to 35oC affect the digestion of starch?

     

1 mark

       (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

      

1 mark

 

       (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.

                    and

1 mark

                 (ii)      Which substance in the list passes through the body without being digested?

                 

1 mark

12.   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.

      

1 mark

 

       (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?

               

2 marks

 

                 (ii)      Give the symbol for the most reactive metal shown in this part of the Periodic Table.

                

1 mark

 

maximum 4 marks

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.

       The results are given in the table below.

       (a)      Suggest which liquid evaporated most rapidly.

                

1 mark

       (b)      After six minutes, the reading went up on the thermometer dipped in ether. Explain why.

                

1 mark

 

       (c)      What is the likely temperature of the room in which they did the experiment?

                 

1 mark

       (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.

 

1 mark

maximum 4 marks

 

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.

       (a)      (i)      Complete the diagram by drawing arrows in compasses X and Y to show the direction of the magnetic field.

2 marks

 

                 (ii)      Draw an arrow in the middle of the glass tube to show the direction of the magnetic field in the glass tube.

1 mark

 

                 (iii)     When the switch is opened, in which direction will the three compass needles point?

                 

1 mark

 

       (b)      Give one way to reverse the magnetic field around the glass tube.

                 

1 mark

 

 

       (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 below. The pieces of iron become magnetised.

                          Label the four poles on the pieces of iron.

1 mark

 

                 (ii)      When the switch was closed, the pieces of iron moved. Explain why they moved.

               

1 mark

 

maximum 7 marks

15.   The diagram shows a simple tool for punching holes in a leather belt.

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.

       (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.

       

1 mark

 

       (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 CM2.

                          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?

                 

1 mark

 

maximum 6 marks