Last updated on December 9th, 2023 at 10:06 pm
MCQ on Teeth and Microbes Class 4 – Test your knowledge on teeth and microbes with these class 4 level multiple choice questions. Covering topics such as types of teeth, tooth decay, and different kinds of microbes, this quiz is a fun way to reinforce learning on these important topics.
[1] At what age do children usually get their first tooth?
a. 3 years old
b. 6 months to 7 months old
c. 12 months to 18 months old
d. 2 years old
Answer: b. 6 months to 7 months old
[2] How many teeth does a child usually have by the age of three?
a. 10 teeth
b. 16 teeth
c. 20 teeth
d. 24 teeth
Answer: c. 20 teeth
[3] When do children’s milk teeth begin to fall out?
a. At the age of 1
b. At the age of 3
c. At the age of 6
d. At the age of 9
Answer: c. At the age of 6
[4] What are the new teeth that grow in place of milk teeth called?
a. Temporary teeth
b. Milk teeth
c. Baby teeth
d. Permanent teeth
Answer: d. Permanent teeth
[4] How many permanent teeth do adult human beings usually have?
a. 16 teeth
b. 20 teeth
c. 28 teeth
d. 32 teeth
Answer: d. 32 teeth
[5] What are the different types of teeth in the upper and lower jaw of the mouth?
a. Canines, molars, incisors, and premolars
b. Front teeth, back teeth, and side teeth
c. Sharp teeth, flat teeth, and round teeth
d. Baby teeth and permanent teeth
Answer: a. Canines, molars, incisors, and premolars
[6] How many incisors teeth are there in total?
a. 4
b. 6
c. 8
d. 10
Answer: c. 8
[7] What is the function of incisors teeth?
a. To tear food
b. To crush food
c. To grind food
d. To cut and bite food
Answer: d. To cut and bite food
[8] Which teeth are located next to the incisors and used for tearing food?
a. Premolars
b. Molars
c. Canines
d. Wisdom teeth
Answer: c. Canines
[9] How many canines are there in total?
a. 2
b. 4
c. 6
d. 8
Answer: b. 4
[10] What is the shape of premolars?
a. Pointed and sharp
b. Flat and wide
c. Broad and round
d. Small and thin
Answer: b. Flat and wide
[11] What is the function of premolars teeth?
a. To tear food
b. To crush food
c. To grind food
d. To cut and bite food
Answer: b. To crush food
[12] Which teeth are located at the back of the mouth and help to grind food?
a. Incisors
b. Canines
c. Premolars
d. Molars
Answer: d. Molars
[13] How many molars are there in total?
a. 4
b. 8
c. 12
d. 16
Answer: c. 12
[14] What is the outer layer of the tooth crown made of?
a. Pulp
b. Enamel
c. Dentine
d. Gum
Answer: b. Enamel
[15] What is the function of the root of a tooth?
a. To hold the tooth firmly in place
b. To produce enamel
c. To contain nerves and blood vessels
d. To prevent cavity formation
Answer: a. To hold the tooth firmly in place
[16] What is the layer beneath the enamel called?
a. Pulp
b. Root
c. Dentine
d. Gum
Answer: c. Dentine
[17] What does the pulp of a tooth contain?
a. Enamel
b. Nerves and blood vessels
c. Germs
d. Food particles
Answer: b. Nerves and blood vessels
[18] How long can permanent teeth last if taken care of properly?
a. A few years
b. A decade
c. A lifetime
d. 100 years
Answer: c. A lifetime
[19] What happens when small pieces of food get stuck between our teeth and are not removed?
a. The tooth becomes harder
b. The enamel becomes thicker
c. Germs grow on it and produce acids that harm the enamel
d. The tooth becomes whiter
Answer: c. Germs grow on it and produce acids that harm the enamel
[20] What are the small holes that form on the teeth due to acid produced by germs?
a. Roots
b. Pulp
c. Cavities
d. Enamel
Answer: c. Cavities
[21] When does a cavity start to hurt?
a. When it is small
b. When it reaches the root
c. When it reaches the dentine
d. When it reaches the pulp
Answer: d. When it reaches the pulp
[22] What are microbes?
a) Small living things that can only be seen under a microscope
b) Large living things that can be seen without a microscope
c) Non-living things that cannot be seen with a microscope
d) Small machines that can only be seen under a microscope
Answer: a) Small living things that can only be seen under a microscope
[23] What are the four main kinds of microbes?
a) Bacteria, fungi, animals, and viruses
b) Plants, animals, fungi, and viruses
c) Bacteria, fungi, protozoa, and viruses
d) Animals, protozoa, plants, and viruses
Answer: c) Bacteria, fungi, protozoa, and viruses
[24] Which is the most common living thing on Earth?
a) Bacteria
b) Fungi
c) Protozoa
d) Viruses
Answer: a) Bacteria
[25] Which microbes can cause tooth decay?
a) Bacteria
b) Fungi
c) Protozoa
d) Viruses
Answer: a) Bacteria
[26] Which microbes can cause skin problems like ringworm and dandruff?
a) Bacteria
b) Fungi
c) Protozoa
d) Viruses
Answer: b) Fungi
[27] Which microbe is the smallest?
a) Bacteria
b) Fungi
c) Protozoa
d) Viruses
Answer: d) Viruses
[28] What kind of diseases can protozoa cause?
a) Skin problems
b) Tooth decay
c) Malaria
d) Common cold
Answer: c) Malaria
[29] Which microbe is used in making food products like cheese, vinegar, and yogurt?
a) Bacteria
b) Fungi
c) Protozoa
d) Viruses
Answer: a) Bacteria
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