Year 8 Final Exam

December 2019

Subject: Science

Time Allowed: 90 minutes

(Question and Answer Booklet)

Student’s Full Name: _________________________Grade:_______

Teacher: __________________________

READ THESE INSTRUCTIONS FIRST

Write in dark blue or black pen.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Answer all questions in the spaces provided on the question paper. The number of marks is
given in brackets [ ] at the end of each question or part question.

The total number of marks for this paper is 84

Answer ALL questions.

Read the questions carefully before you answer and show all calculations.

Additional Equipment
Calculator, ruler, pencil, eraser

1. The diagram shows the human respiratory system.

1
(a) Name the parts

A...........................................

B............................................ [2]

2. Poor diets can cause health problems.

(a) Draw a line between the diets and the health problems.

One has been done for you.

(b) Chen and Mark look at information about the amount of fat and fibre in different fruits.
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(i) Name the two fruits with the highest amount of fibre.

.................................................... and ............................................................ [1]

(ii) Why is fibre important in the diet?

...................................................................................................................................... .............
........................................................................................................................ [1]

(iii) Write one conclusion about the amount of fat found in fruits.

...................................................................................................................................... .............
........................................................................................................................ [1]

(iv) Mike thinks the information in the table is not a fair comparison because the fruits
present different shapes.

Lee thinks it is not a fair comparison but he knows that the shape of the fruit is not
important.

What measurement do they need to make a fair comparison?

...................................................................................................................................... .............
........................................................................................................................ [1]

3. The diagram shows what a root hair cells looks like when viewed with a microscope.

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(a) Identify the structures labelled A and B on the diagram.

A......................................................................................................................................
B..................................................................................................................................... [2]

b) Describe one way you can tell this is a plant cell and not an animal cell.

...................................................................................................................................... [1]

(c) Which cell structure, usually found in plant cells, is missing from root hair cells?

..................................................................................................................................... [1]

(d)Write down one function of a root hair cell.

..................................................................................................................................... [1]

4. The diagram shows part of the circulatory system.

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(a) Name the types of blood vessels labelled X and Y in the diagram.

X .....................................................................................................................................

Y ....................................................................................................................................... [2]

(b) Name the organ where gaseous exchange takes place.

......................................................................................................................................[1]

5. This diagram shows the human alimentary canal

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(a) Name the parts labelled A and B.

A .................................................................

B ................................................................. [2]

(b) Write down one function of the small intestine

C. ..........................................................................................................................................

..........................................................................................................................................

.............................................................................................................................................[1]

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6. Usman trains to run a 1 km race. He measures his heart rate while running. Here are his
results.

(a) Plot the results for heart rate on the grid below.

Four of the points have been plotted for you.

Label both axes.

Draw a smooth curve through the points.

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(b) Use your graph to predict Usman’s heart rate at time 2 minutes.

......................................................................................................... beats per minute [1]

(c) Explain why Usman’s heart rate increases during exercise.

...................................................................................................................................................
.

....................................................................................................................................................

................................................................................................................................................[2]

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7. Anastasia trains to run a 1 km race.

She measures her breathing rate while running.

Here are her results.

(a) Use the table to predict Anastasia’s breathing rate at 0 minutes.

...................................................................................................... breaths per minute [1]

(b) Anastasia’s muscles were respiring aerobically.

Complete the word equation for aerobic respiration

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8. Themba investigates how plants take up water.

Here is the equipment he uses.

(a) Which part of the plant takes in water?

......................................................................................................................................[1]

(b) Describe how a plant takes in water.

......................................................................................................................................[1]

(c) Describe what happens to the water after it is taken in by a plant.

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

......................................................................................................................................[3]

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9. The diagram shows some of the cells from the lining of the windpipe (trachea).

(a) Write down the function of the cilia.

...................................................................................................................................................
.

...............................................................................................................................................[1]

(b) What effect does cigarette smoke have on cilia?

...................................................................................................................................................
.................................................................................................................................................
[1]

(c) Name the addictive substance in cigarette smoke.

....................................................................................................................................................
................................................................................................................................................[1]

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10. (a) Draw a straight line between the name of the element and its chemical symbol.

11.
(a) Mariana makes a poster showing different types of substances for a school project.

The labels on her poster are missing.

Write the correct label under each diagram.

Choose from the following words.

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(b) Hydrogen and oxygen react together to make water.

Write a word equation for this reaction.

....................................................................................................................................................
............................................................................................................................. ..................[2]

12. Vinegar contains a substance with the formula C2H4O2. Name the three elements in
vinegar.

1 ...............................................................................................................................................

2 ...............................................................................................................................................

3 ...........................................................................................................................................[3]

13. Ice, water and steam all contain water molecules.

Complete these sentences using the words from the list.

larger than the same as smaller than

You may use them more than once or not at all.

a) In a steam, the distance between the molecules is ................................the distance

between the molecules in water.
b) In steam, the forces between the molecules are.........................................the forces
between the molecules in water.
c) In water, the mass of one molecule is ................................................the mass of one
molecule in steam. [3]

14. The diagram shows the particle arrangement in a liquid.

13
(a)Draw the particle arrangement in a solid.

(b) Angelique puts five drops of a liquid perfume on the back of her hand.

A few seconds later Angelique can smell the perfume.

This is because the perfume diffuses into her nose.

(i) Complete the sentences about diffusion.

In diffusion the perfume moves from an area of ..........................concentration to an area

of....................concentration. [1]

(ii) Explain, using the particle theory of matter, how diffusion takes place.

....................................................................................................................................................
................................................................................................................................................[1]

15. Emily uses a prism to investigate the colours in white light.

Emily draws a diagram but only writes the names of the first and the last of the seven
colours.

Fill in the five missing colours in the correct order.

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16. The diagram shows a bat in a garden at night.

(a) When it is completely dark the child cannot see the bat but if the moon is shining she can
see it.

Explain why the child can see the bat in moonlight.

....................................................................................................................................................
....................................................................................................................................................
................................................................................................................................................[2]

(b) When the security light is switched on, a shadow of the bat is formed on the garage wall.

(i) Draw lines on the diagram to show how a shadow of the bat is formed on the wall.

Label the shadowed area. [2]

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(ii) If the bat moves nearer to the garage wall, what will happen to the size of its shadow?

................................................................................................................................................[1]

c) What piece of apparatus would you use to measure the distance between the light and
the garage wall?

................................................................................................................................................[1]

17. (a) A scientist sets up two experiments. In both experiments he has a torch, two pieces
of card with holes in them and a screen.

(i) The first experiment is shown in diagram 1.

The scientist could see a spot of light on the screen.

Draw the ray of light to show its path on diagram 1 after it has passed through the hole in
card A. [1]

(ii) The second experiment is shown in diagram 2.

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The hole in card B is not in line with the hole in card A.

Draw the ray of light to show its path on diagram 2.

(iii)Explain why the light is unable to reach the screen.

....................................................................................................................................................

................................................................................................................................................[1]

(b) A pinhole camera allows an image of an object to be projected onto a screen.

Draw two rays of light, one from the bottom of the pencil and one from the top of the
pencil, to show how the image forms on the screen. [2]
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18. Lily, Mila and Safia mix different coloured light.

They use light of the same intensity.

.Lily has a pure blue light torch.

.Mia has pure green light torch.

Safia has a pure red light torch.

.They make the light from the three torches overlap.

(a)Complete the sentences.

Choose from the following words.

Black cyan green magenta white

yellow

(i) When Lily´s torch light overlaps with Mia´s torch light........................light is produced. [1]

(ii) When Safia´s torch light overlaps with Lily´s torch light, .................. light is produced. [1]

(iii)When the three torch lights overlap ....................................light is produced. [1]

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(b)Lily switches off her torch light.

What happens to the colour of light at X?

............................................................................................................................................... [1]

19. The next figure represents the phenomenon of reflection.

On the diagram:

• show the direction of the light beam by adding an arrow

• label the angle of incidence with the letter i

• label the normal with the letter N

• label the reflected ray with the letter R. [3]

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20. Look at the next figures and choose the best word to complete the sentences.

a) Rays that enter the glass along the normal bend/ don’t change direction.

b) The ray bends towards/away from the normal when they enter a glass.

c) The ray bends towards/ away from the normal when it leaves the glass.

d) The ray that leaves the glass is parallel/ not parallel to the incident ray.

e) Unless the ray enters along the normal, the angle of refraction is always larger/ smaller
than the angle of incidence.

(5)

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