Tooth Decay

Q. Bacteria in the mouth break down the sugars present from the leftover food and release acids. The acids gradually damage the teeth.

1. False
2. True

Q. The sharp, dagger-shaped teeth in the buccal cavity are known as ________.

1. 
   incisors
2. 
   canines
3. 
   molars
4. 
   premolars

Q. A dental floss is a special strong thread which is used to take out food particles trapped between the teeth.

1. True
2. False

Q. Name any two types of teeth. What is the use of teeth? [2 MARKS]

Q.

Explain the following digestive organ and write its functions

1. teeth

Q. Teeth are rooted in separate ______________ between the ___________.​

1. sockets; gums​
2. gums; sockets​

Q.

The first set of teeth that lasts for about six years of age is called _____ .

1. milk teeth

2. permanent teeth

3. molar teeth

4. canines

Q. The sharp, dagger-shaped teeth in the buccal cavity are known as ________.

1. 
   incisors
2. 
   canines
3. 
   molars
4. 
   premolars

Q. Name four types of teeth. [2 MARKS]

Q. Select the correct option related to different types of teeth in the mouth.

1. 2 Incisors, 1 canines, 2 pre-molars and 3 molars per arch
2. 1 Incisors, 2 canines, 2 pre-molars and 3 molars per arch
3. 2 Incisors, 1 canines, 1 pre-molars and 3 molars per arch
4. None of the above

Q. One should brush the teeth at least ______ and rinse the mouth after every meal.

1. once a day
2. once in two days
3. twice a day
4. thrice a day

Q.

A smooth silk thread used to clean teeth is known as __________ .

1. Tongue cleaner

2. Dental floss

3. Toothbrush

4. Mouthwash

Q. Match the teeth with the functions they perform.

1. Tearing food
2. Cutting and biting food
3. Crushing and grinding food

Q.

The following picture shows the different types of teeth present in your mouth. From the given options, select the option which matches with their name and function.

1. A - Incisor-Cutting and biting
   B - Canines- Chewing and grinding
   C - Premolars-Chewing and grinding
   D - Molars-Piercing and tearing

2. A - Incisor-Chewing and grinding
   B - Canines-Piercing and tearing
   C - Premolars-Cutting and biting
   D - Molars-Chewing and grinding

3. A - Incisor-Cutting and biting
   B - Canines-Piercing and tearing
   C - Premolars-Chewing and grinding
   D - Molars-Chewing and grinding

4. A - Incisor-Chewing and grinding
   B - Canines-Chewing and grinding
   C - Premolars-Piercing and tearing
   D - Molars-Cutting and biting

Q. Question 26
Label the below given Figure as directed below in (i) to (iv) and give the name of each type of teeth.

i) The cutting and biting teeth as ‘A’
ii) The piercing and tearing teeth as ‘B’
iii) The grinding and chewing teeth as ‘C’
iv) The grinding teeth present only in adult as ‘D’

Q. The teeth that are used for biting an apple are

(a) incisors
(b) canines
(c) pre-molars
(d) molars

Q. The process of removal of excess substances that may harm the body is known as ________.

1. digestion
2. excretion
3. diffusion
4. absorption

Q. The major reason for tooth decay are

1. Sweets
2. All of the above
3. Cold drinks
4. Chocolates

Q. Plaque is

1. Hard, protective covering on the tooth
2. Soft covering of the tooth which is present below the visible part
3. The cavity which contains nerves and blood vessels in a tooth
4. Sticky film of food, saliva and bacteria near the gums

Q. The measures to prevent tooth decay are

1. Rinsing the mouth after meals
2. Brush
3. Dental floss
4. All of the above

Q. Which of the following is not true for the care of teeth?

1. We should not chew the food.
2. We should not eat too many sweets.
3. We should brush twice a day.
4. We should eat raw fruits and vegetables.

Q. The various kinds of teeth present in human beings are:

1. Premolars and canines
2. Muscular pharynx and molars
3. Molars and incisors
4. Incisors, canines, premolars and molars

Q. Identify the different types of permanent teeth in humans from the given image.

1. Incisor
2. Canine
3. Premolar
4. Molar

Q. Identify the different types of permanent teeth in humans from the given image.

1. Incisor
2. Canine
3. Premolar
4. Molar

Q. Milk teeth falls off between the age of?

1. 6-8 years old
2. 4-6 years old
3. 15-18 years old
4. 12-14 years old

Q. Teeth are fixed at their position with the help of gums.

1. False
2. True