Worksheet on Teeth and Microbes

Worksheet on teeth and microbes contains various types of questions on different kinds of teeth , their structure and microbes.

We know, the first teeth that a child has are milk teeth. They fall off and are replaced by permanent teeth.

I. Fill in the blanks:

(i) The sharp and pointed teeth in our mouth are called ________.

(ii) A person who is 30 years old should have 32 ________ teeth.

(iii) In our mouth the 8 ________ in front are the cutting teeth.

(iv) A tooth with a cavity will start paining if the cavity reaches the ________.

(v) ________ are the smallest microbes.

(vi) ________ are the most abundant microbes on the earth.

II. Mark a tick (√) or cross (X) against each given statement:

(i) You have 32 milk teeth.

(ii) All our teeth have the same shape.

(iii) The surface of your teeth is harder than a bone.

(iv) Premolars and molars crush and grind food.

(v) A microbe is as small as a grain of sand.

(vi) All microbes are harmful to us.

III. Answer the following questions:

(i) How many sets of teeth do humans have during their lifetime? Name them.

(ii) What will happen to our teeth if we do not brush them regularly?

(iii) Name the different kinds of teeth a human has and say what each is used for.

Check the answers of worksheet on teeth and microbes:

Answers:

I. (i) canine

(ii) permanent

(iii) incisors

(iv) pulp

(v) Viruses

(vi) Bacteria

II. (i) X

(ii) X

(iii) √

(iv) √

(v) X

(vi) X

III. (i) A human have 32 teeth during their lifetime. They are canines, incisors, molars and premolars.

(ii) If we do not brush our teeth regularly they may decay and fall off.

(iii) The different kinds of teeth a human have are canines, incisors, molars and premolars. We have incisors for cutting, canines for tearing, premolars and molars for crushing and grinding food.

Fourth Grade

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