8Aa

1       A food substance found in many foods is:

A       carbohydrate.                 B       chalk.

C       energy.                           D      carbon dioxide.

2       What is used to test a food for starch?

A       iodine solution

B       potatoes

C       Benedict’s solution

D       Fehling’s solution

3       One of the ways in which water is used by the body is as:

A       a source of fibre.

B       a source of energy.

C       a solid.

D       a solvent.

4       Fibre in your diet helps to stop:

A       you lying.

B       scurvy.

C       constipation.

D       digestion.

8Ab

1       You have a balanced diet when: 

A       the mass of all the food you eat in a day adds up to 100 kg.

B       the mass of all the food you eat one day is equal to the mass you eat the next day.

C       you eat a wide range of different foods to give your body all the things it needs.

D       you only eat fish on Fridays.

2       Which of these people will need to eat the most food in a day?

A       a 3-year-old child

B       an 85-year-old woman

C       a 35-year-old man, who works outside cutting down trees

D       a 25-year-old woman, who works in an office using a word processor

3       Meats are a good source of which food substance?

A       fibre                               B       protein

C       oxygen                           D      vitamins

4       Why do we need protein in our food?

A       It is a good source of energy.

B       It is used for growth and repair.

C       It is full of vitamins.

D       It helps food to pass through the gut smoothly.

8Ac

1       Which organ is labelled X in the drawing below?

A       small intestine                  B       stomach

C       liver                                D      mouth

2       In the diagram above what does the organ labelled X do?

A       It mixes up food with acid and breaks down proteins.

B       It adds vitamins to the food.

C       It takes the water out of the food.

D       It stores waste food until it can be got rid of.

3       In digestion:

A       soluble food substances are made into insoluble ones.

B       insoluble food substances are broken up into soluble ones.

C       food is stored inside the body until it is needed.

D       waste food is removed from the body.

4       The main chemicals used to digest foods are:

A       vitamins.                         B       salivas.

C       digestifs.                         D      enzymes.

8Ad

1       Which label shows the place where digested food is taken into the blood?

2       The drawing shows a model gut. Which part represents the inside of the small intestine?

3       

The enzymes in humans work best at body temperature. What temperature is this?

A       37 °C                             B       0 °C

C       100 °C                           D      98 °C

4       The pH of the mouth is about pH7. The conditions that enzymes in the mouth work best at are:

A       neutral.                           B       acidic.

C       alkaline.                          D      basic.

8Ae

1       When digested food is taken into the blood it is said to be:

A       egested.                          B       ingested.

C       absorbed.                       D      insoluble.

2       Digested food is carried around the body in the:

A       digestive system.

B       circulatory system.

C       breathing system.

D       nervous system.

3       What is the digested food used for inside our bodies?

A       to provide energy only

B       to provide energy and chemicals to make new substances

C       to help us go to the toilet more easily

D       to provide substances to make sure that the blood does not become too runny

4       What job does an artery do?

A       carries water to be mixed with blood

B       carries blood to the heart

C       carries blood away from the heart

D       carries blood to the brain only