8AB Test

Clevedon Community School

Science Department

Year 8 AB Test

Food, Digestion and Respiration 30 min

41 marks

North Somerset Bulk LEA

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North Somerset Bulk LEA

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1.

The card shows the amounts of fat and fibre in some types of food and drink from a cafĂŠ.

C h e z J e a n C a fĂŠ fa t in g

fib r e in g

s in g le b u r g e r

17

0 .8

d o u b le b u r g e r

38

1 .2

c h e e s e b u rg e r

21

1 .0

s tr a w b e r r y m ilk s h a k e

8

0

m e d iu m c o la

0

0

m e d iu m o r a n g e ju ic e

0

0

r e g u la r f r ie s

15

3

b a k e d p o ta to

0

9

ty p e o f b u rg e r

ty p e o f d r in k

ty p e o f p o ta to

North Somerset Bulk LEA

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(a)

From the card above, choose a meal consisting of a burger, a drink and some potato, to give: (i)

the least fat; 1 mark

(ii)

the most fibre.

1 mark

Write your answers in the table below.

Food and drink

meal with the least fat

meal with the most fibre

type of burger the drinks do not contain fibre

type of drink type of potato (b)

Draw a line from each nutrient to the main reason why it is needed.

Draw only four lines. nutrient

main reason why the nutrient is needed to keep the intestine working properly

• calcium

•

•

fibre

•

•

for insulation

protein

•

•

sugar

•

for growth and repair

•

for healthy teeth and bones

to provide energy

4 marks Maximum 6 marks

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2.

The diagram below shows an organ system in the human body.

(a)

What is the name of the organ system shown in the diagram?

Tick the correct box. circulatory system digestive system reproductive system respiratory system 1 mark

(b)

What are the names of parts A and B? part A ..................................................................……. part B ..................................................................…….

2 marks

(c)

Parts C are bones which support the chest. Give the name of these bones.

1 mark

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(d)

The photograph shows a man using a sanding machine on a piece of wood.

He is wearing a mask to stop him from breathing in the sawdust.

The mask has tiny holes in it. (i)

When the man breathes in, the mask separates particles of sawdust from the air.

What is this method of separation called? .................................................................................................................

1 mark

(ii)

If the man breathed in the particles of sawdust, what might happen to him? ................................................................................................................. .................................................................................................................

1 mark Maximum 6 marks

3.

The table shows the mass of water, fat, fibre and vitamin C in 100 g of potato cooked in three different ways. water, in g

fat, in g

fibre, in g

vitamin C, in mg

100 g of chips

57

7

2

9

100 g of boiled, peeled potato

80

hardly any

1

6

100 g of potato baked in its skin

63

hardly any

3

14

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(a)

Use information from the table to help you fill the gaps in the following sentences. (i)

Chips are crisper than boiled potatoes because chips contain less ...................................................................

1 mark

(ii)

Most of the fibre in a baked potato is in the ............................................... of the potato.

1 mark

(b)

Use the information in the table to work out how much vitamin C there is in: 200 g of chips .............. mg; 200 g of potato baked in its skin .............. mg.

1 mark

(c)

People do not always eat a balanced diet.

Draw one line from each fact about a person's diet to the organ it harms.

Draw only three lines. fa c t a b o u t th e d ie t

o rg a n h a rm e d

h e a rt n o t e n o u g h c a lc iu m in t e s t in e n o t e n o u g h f ib r e lu n g to o m u c h fa t bones 3 marks Maximum 6 marks

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4.

Harry investigated the effects of fizzy cola drink on his heart rate.

First he measured his heart rate every minute for 5 minutes when sitting down.

Then he drank some cola.

He continued to measure his heart rate at regular intervals.

This is a graph of his results.

11 0 100 90 80 70 ×

× ×

×

×

×

×

×

×

×

×

× ×

×

×

× ×

×

×

×

×

h e a rt ra te 60 ( b e a ts p e r m in u te ) 50 40 30 20 10 0

(a)

0

2

4

6

8

10 12 14 t im e ( m in u te s )

16

18

20

22

Why did Harry measure his heart rate every minute for 5 minutes before drinking his cola? ..................................................................................................................... .....................................................................................................................

1 mark

(b)

Harry says cola affects his heart rate.

What evidence is there in the graph to support his idea that cola affects his heart rate? ..................................................................................................................... .....................................................................................................................

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1 mark

(c)

Harry and Yasmin came to the following conclusions.

Harry

Yasmin

Explain why Yasmin’s conclusion is better than Harry’s conclusion. ..................................................................................................................... .....................................................................................................................

1 mark

(d)

Yasmin said, “We should also measure Harry’s heart rate after he drinks fizzy water”.

How would measuring Harry’s heart rate after he drinks fizzy water improve the investigation? ..................................................................................................................... .....................................................................................................................

1 mark maximum 4 marks

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5.

The table shows the recommended daily intake of energy and some of the nutrients needed by different groups of people. n u t r ie n ts g ro u p o f p e o p le

e n e rg y, in k J

p ro te in , in g

c a rb o h y d ra te , in g

fa t, in g

m a le 1 5 – 1 8

11510

5 5 .2

360

fe m a le 1 5 – 1 8

8830

4 5 .0

m a le 1 9 – 5 0

10600

fe m a le 1 9 – 5 0 p re g n a n t fe m a le (a)

(i)

m in e r a ls , in g c a lc iu m

ir o n

109

1000

1 1 .3

276

84

800

1 4 .8

5 5 .5

331

100

700

8 .7

8100

4 5 .0

253

77

700

1 4 .8

8900

8 1 .0

278

84

700

1 4 .8

Explain why two 16 year-old males of the same weight might need different amounts of energy. ............................................................................................................. .............................................................................................................

1 mark

(ii)

Which two types of nutrient provide most of the energy in our diet?

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

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

2 marks

(b)

(i)

Calculate the difference in the recommended daily intake of calcium for a 15 year-old male and a 30 year-old male. .......................... mg 1 mark

(ii)

Calcium is needed for healthy bones. Explain the difference in the amount of calcium needed each day by a 15 year-old male and a 30 year-old male. ............................................................................................................. .............................................................................................................

1 mark

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(c)

Look at the table. Explain the difference in the amount of protein needed by a 25 year-old pregnant female and a 25 year-old female who is not pregnant. ..................................................................................................................... .....................................................................................................................

1 mark

(d)

Iron is needed to make blood.

Explain why a 15 year-old female might need more iron than a 15 year-old male. ..................................................................................................................... .....................................................................................................................

1 mark Maximum 7 marks

6.

(a)

Jasmine was trying to find out how much air she breathed out in one breath.

She poured water into a bell-jar and placed it upside down in a trough of water.

The bell-jar had a scale marked in cm3. before Jasmine breathed into the bell-jar

after Jasmine breathed into the bell-jar

North Somerset Bulk LEA

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(i)

How much air did Jasmine breathe out? ……………………… cm3 1 mark

(ii)

Air contains carbon dioxide, nitrogen, noble gases, oxygen and water vapour.

Give three differences between the composition of the air Jasmine breathed in and the air she breathed out.

Compared to the air she breathed in, the air she breathed out contained: 1. ............................................................................................................

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

3. ............................................................................................................

3 marks

(b)

In the diagram below, tube A connects the lungs to the mouth. Part B is a part of the lung where gas exchange takes place. (i)

On the diagram, write the names of tube A and part B.

2 marks

(ii)

In the wall of tube A there are'rings'of a stiff material called cartilage.

Suggest one function of the 'rings' of cartilage. ................................................................................................................. .................................................................................................................

1 mark Maximum 7 marks

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7.

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