8A Quick Quiz

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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.



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.



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.



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?



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.



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