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Healthy Teeth

In this worksheet, students will be helped to extend their understanding of how to care for our teeth and why it is necessary.

'Healthy Teeth' worksheet

Key stage:  KS 2

Curriculum topic:   Animals, including Humans

Curriculum subtopic:   Teeth

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Once our milk teeth have been replaced by our adult teeth, we really need to look after them - they have to last a lifetime!

 

Mouth

 

The job of the teeth is to mash up food to make it easier to digest but that means that little bits of food get stuck everywhere around them. We need to clean that leftover food away because if it's left for too long the teeth can be damaged.

 

Let's find out why!

Here is a cut-away picture of a tooth:

 

Cross-section of a tooth 

 

Use the picture to find out the name of the substance that covers our teeth.

enamel

dentin

gum

pulp

The substance you named in Q1 is the hardest and toughest living substance in nature. It protects our teeth from everything our food throws at them.

 

About how long is this substance designed to protect our teeth for?

30 years

60 years

80 years

120 years

Here is that cut-away of the tooth again:

 

Cross-section of tooth

 

What is the name of the area at the bottom of the crown of the tooth (that's the bit that you can see) that the tooth grows out of?

bone

gum

dentin

The area you named in Q3 is just as important to keep clean as your teeth, so make sure you brush it as well!

 

Child brushing teeth 

 

If it is not looked after properly what do you think may happen?

teeth may become loose and fall out

you won't be able to smile properly

you will only be able to drink liquids

One sort of food is particularly harmful to your teeth.

 

Do you know which one?

cabbage

sugar

crisps

milk

Once the food in Q5 is left on your tooth for long, the bacteria in your mouth start to eat it. They produce chemicals called ACIDS.

 

What do you think these acids will do to the hard covering of your teeth?

clean it

attack it

turn it yellow

If the substances left after eating food are not cleaned away properly, something called PLAQUE starts to form on your teeth.

 

Here is a picture of plaque - they are the red areas on the teeth left behind after chewing a special tablet that helps to reveal areas of plaque:

 

Disclosing tablet on teeth 

 

What do you think is the best way of removing plaque from your mouth?

scraping with a sharp instrument

swallowing an anti-plaque liquid

brushing thoroughly with toothpaste

Here's a cut-away of the tooth again:

 

Cross-section of tooth 

 

In Q4 you learned that the area that the tooth grows out of needs to be looked after properly. One way of doing that is to use something called DENTAL FLOSS:

 

 Dental floss

How do you think floss helps to clean your teeth?

it gets between your teeth and removes bits of food

it has toothpaste on it which it rubs on to the tooth

it contains a chemical that kills the bacteria on the tooth

CALCIUM is a mineral that you get from the food you eat that is also very important in helping to keep teeth strong and healthy. Tick THREE foods in the list that you think are a good source of calcium.

pizza

carrot

milk

cheese

beef

weetabix

sardines

bananas

One more mineral that's very important for strong teeth is called FLUORIDE.

 

Tick TWO places where you think your body can get the fluoride you need for your teeth.

water

air (breathing)

exercise

apples

toothpaste

  • Question 1

Here is a cut-away picture of a tooth:

 

Cross-section of a tooth 

 

Use the picture to find out the name of the substance that covers our teeth.

CORRECT ANSWER
enamel
EDDIE SAYS
Yes, it's enamel that covers our teeth and makes them white. In fact it's a tremendously tough substance - it has to be, considering what you are going to throw at it over your lifetime!
  • Question 2

The substance you named in Q1 is the hardest and toughest living substance in nature. It protects our teeth from everything our food throws at them.

 

About how long is this substance designed to protect our teeth for?

CORRECT ANSWER
80 years
EDDIE SAYS
Of course it's going to vary from person to person but enamel is designed to last a lifetime - about 80 years. Some people live longer and it depends on how well they have looked after their teeth as to whether the enamel is still working at protecting their teeth.
  • Question 3

Here is that cut-away of the tooth again:

 

Cross-section of tooth

 

What is the name of the area at the bottom of the crown of the tooth (that's the bit that you can see) that the tooth grows out of?

CORRECT ANSWER
gum
EDDIE SAYS
The pink area at the base of your teeth is your gum(s) and is just as important to look after properly as your teeth. When it's healthy your teeth are firmly held with tiny gaps between them.
  • Question 4

The area you named in Q3 is just as important to keep clean as your teeth, so make sure you brush it as well!

 

Child brushing teeth 

 

If it is not looked after properly what do you think may happen?

CORRECT ANSWER
teeth may become loose and fall out
EDDIE SAYS
Your gums secure your teeth in your mouth so, if your gums are in poor condition, your teeth will have big gaps between them and may start to fall out. Smiling may be a problem only if you're embarrassed by your bad teeth and, at its worst, you're not going to be able to chew anything - soup only!
  • Question 5

One sort of food is particularly harmful to your teeth.

 

Do you know which one?

CORRECT ANSWER
sugar
EDDIE SAYS
The trouble with sugary foods is that bacteria in your mouth love them. When you eat sweet things some of the sugar gets stuck in all the cracks and crevices in and around your teeth. The bacteria start munching and, as they do so, an acid is released that attacks your teeth - that's why sugary foods need cleaning away quickly!
  • Question 6

Once the food in Q5 is left on your tooth for long, the bacteria in your mouth start to eat it. They produce chemicals called ACIDS.

 

What do you think these acids will do to the hard covering of your teeth?

CORRECT ANSWER
attack it
EDDIE SAYS
Acids are the enemy of the hard enamel and if allowed to they start to dissolve it - that leads to tooth decay and then the dentist is going to have to go to work to repair it.
  • Question 7

If the substances left after eating food are not cleaned away properly, something called PLAQUE starts to form on your teeth.

 

Here is a picture of plaque - they are the red areas on the teeth left behind after chewing a special tablet that helps to reveal areas of plaque:

 

Disclosing tablet on teeth 

 

What do you think is the best way of removing plaque from your mouth?

CORRECT ANSWER
brushing thoroughly with toothpaste
EDDIE SAYS
In fact proper brushing will do the job - there are lots of decent toothbrushes (including electric ones) and excellent toothpastes which will help remove the plaque. Only a dentist would use a scraper (but they can see what they're doing - and they're trained!) and anti-plaque mouthwashes won't work as well as proper brushing.
  • Question 8

Here's a cut-away of the tooth again:

 

Cross-section of tooth 

 

In Q4 you learned that the area that the tooth grows out of needs to be looked after properly. One way of doing that is to use something called DENTAL FLOSS:

 

 Dental floss

How do you think floss helps to clean your teeth?

CORRECT ANSWER
it gets between your teeth and removes bits of food
EDDIE SAYS
If you look you can see a little gap between the tooth and the gum - the floss (in your hands) gets into this gap to remove remains of food as you move the floss to and fro.
  • Question 9

CALCIUM is a mineral that you get from the food you eat that is also very important in helping to keep teeth strong and healthy. Tick THREE foods in the list that you think are a good source of calcium.

CORRECT ANSWER
milk
cheese
sardines
EDDIE SAYS
Most dairy products have a high calcium content. Many fish are also good, especially sardines. Many foods have a little calcium in but not many have a reasonably high calcium content.
  • Question 10

One more mineral that's very important for strong teeth is called FLUORIDE.

 

Tick TWO places where you think your body can get the fluoride you need for your teeth.

CORRECT ANSWER
water
toothpaste
EDDIE SAYS
In fact the best source of fluoride for your teeth is ... your toothpaste! It gets absorbed through your gums. You also get some out of your drinking water.
---- OR ----

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