8A science test paper questions

Question 1

Fats and minerals are types of nutrient in food. Name two other types of nutrient in food.

Answer 1

protein and carbohydrate

Question 2

Describe what teeth do to food when we chew.

Answer 2

Teeth break the food into smaller pieces.

Question 3

Three people are talking about diets.
Asha says: I’ve never had a diet.
Daniel says: I’m now on a diet because I need to lose weight.
Sylvia says: I’ve always had a diet.
Give a reason why Sylvia’s answer is the best.

Answer 3

Sylvia’s answer is the best because everyone has a diet, which refers to everything they eat.

Question 4

Give a reason why the body needs to digest food.

Answer 4

To break food down into smaller, soluble molecules that the body can absorb.

Question 5

Describe how food is pushed through the oesophagus.

Answer 5

Muscles above the food contracts squeezing the food along.

Question 6

Describe one adaptation of the small intestine to its role of absorbing digested food.

Answer 6

The small intestine has villi to increase surface area for absorption

Question 7

Name the process by which digested food molecules are absorbed into the body.

Answer 7

Absorbtion

Question 8

What is the life process used to release energy from food? Tick one box.
A respiration
B digestion
C reproduction
D circulation

Answer 8

Respiration

Question 9

What percentage of a diet does the pie chart show should be protein? Tick one box.
A 7%
B 12%
C 15%
D 33%

Answer 9

12%

Question 10

Name one food you would find in the ‘dairy products’ section.

Answer 10

Milk

Question 11

What is measured in kJ? Tick one box.
A mass
B weight
C energy
D force

Answer 11

energy

Question 12

Superflakes are not a good source of protein. Name one food that is an excellent source
of protein.

Answer 12

Meat

Question 13

Describe two ways our body can use protein.

Answer 13

Protein helps with growth and repair

Question 14

Give a reason why fibre is good for the body.

Answer 14

It helps food move easily through the gut

Question 15

If you add up the masses of the food substances in 100g, there seems to be nearly 18g
missing. What substance might this 18g be? Tick one box.
A sugar
B starch
C vitamin C
D water

Answer 15

Water

Question 16

Give two reasons why Peter now has a big belly.

Answer 16

He now does less physical exercise.
He eats more energy than he needs now

Question 17

Explain why Peter may gain more weight if he keeps eating a lot of sugary foods.

Answer 17

sugar is stored as fat if it is not used for energy

Question 18

Suggest one reason why Peter should lose some weight.

Answer 18

Being overweight increases the risk of health problems like heart disease or diabetes.

Question 19

What is the substance that the student is trying to show using iodine solution? Tick one box.
A sugar
B protein
C starch
D fat

Answer 19

starch

Question 20

After 40 minutes, the sample taken from the tube at 25°C does not produce a black colour
with iodine solution. What type of substance in saliva causes this to happen? Tick one box.
A enzymes
B spit
C chemical
D bile

Answer 20

enzymes

Question 21

At what temperature does the saliva work the fastest?

Answer 21

35°C

Question 22

Name the organs the food passes through in order, starting with the mouth. (SPELLING MATTER)

Answer 22

mouth, oesophagus, stomach, small intestine,
large intestine, rectum, anus

Question 23

what colour is: fat, saturated fat,
sugar and salt

Answer 23

fat (amber), saturated fat (red),
sugar (red), salt (amber)

Question 24

Peter needs about 9000kJ per day. How many grams of biscuits would he have to eat to
get all the energy he needs for one day?

Answer 24

500g