Teeth-Growth Science Worksheet (Page 2 of 6) in pdf

Teeth-Growth Science Worksheet Page 2

3. Complete the missing parts of the text with the verbs from the box.

grasp

cut

shovel

chew

tear

grind

crush

The incisors are built to 1.………..food and 2.………… it inwards. They are the sharpest teeth. The

role of the canine teeth is to 3.…..... and 4.……….. the food. Therefore they have very long roots. The

premolars have a flat surface so they are able to 5.…….…the food and the molars which are much

bigger than premolars and have a flatter surface 6………. and 7……….. it into small pieces.

The adult teeth

When all permanent teeth erupt they are 32 all together – 16 on the top and 16 on the bottom. 20 have

replaced the baby teeth, and the other 12 are new molars. They are large and their role is to do

chewing. The first molars we get are called 6-year molars. The second molars come in when we are

about 12 years old, so they are called 12-year molars. The third molars are referred to as the wisdom

teeth.

4. Read the description of the individual teeth. Then complete the diagram below.

Centrals: the two upper and two lower teeth in the centre of the mouth.

Laterals: the teeth next to the centrals.

Cuspids: the pointy teeth behind the laterals. They have one cuspal (point).

First Bicuspids: the teeth just behind the cuspids. These teeth have two cuspals.

Second Bicuspids: the teeth behind the first bicuspids. They also have two cuspals.

First Molars: the teeth just behind the second bicuspids. They have a flat surface with four cuspals.

Second Molars: they are the next teeth in the upper and lower row. They also have a flat surface with

four points.

Third Molars: the last teeth in the row and look the same as the second molars.

Teeth-Growth Science Worksheet Page 2