Q1: How many temporary teeth do children usually have by age 3? (a) 16 teeth (b) 20 teeth (c) 24 teeth (d) 32 teeth
Solution:
Ans: (b) Explanation: By age 3, children usually have 20 primary teeth, also called milk teeth or deciduous teeth, which later fall out.
Q2: Which teeth are used for biting and cutting food into small pieces? (a) Molars (b) Canines (c) Incisors (d) Premolars
Solution:
Ans: (c) Explanation: Incisors are flat teeth with sharp edges located at the front of the mouth, and they are used for biting and cutting food.
Q3: What is the hardest substance in the human body? (a) Dentine (b) Bone (c) Enamel (d) Pulp
Solution:
Ans: (c) Explanation: Enamel is the hardest substance in the human body. It is the white, shiny outer layer that protects the tooth from decay.
Q4: How many permanent teeth do adults typically have? (a) 20 teeth (b) 24 teeth (c) 28 teeth (d) 32 teeth
Solution:
Ans: (d) Explanation: Adults typically have 32 permanent teeth, also known as adult teeth, which replace the temporary teeth starting around age 6 or 7.
Q5: Which part of the tooth contains blood vessels and nerves? (a) Enamel (b) Crown (c) Dentine (d) Pulp
Solution:
Ans: (d) Explanation: The pulp is the central soft part of the tooth that contains blood vessels and nerves to supply nutrients and nourish the tooth.
Fill in the Blanks
Q1: Babies are born without teeth, but they develop over _____.
Solution:
Ans: time
Q2: The soft tissues that surround and hold teeth firmly are called _____.
Solution:
Ans: gums
Q3: Canines are _____ and pointed teeth used for tearing food.
Solution:
Ans: sharp
Q4: The sticky yellow coating on teeth caused by germs is called _____.
Solution:
Ans: plaque
Q5: The visible part of the tooth is called the _____.
Solution:
Ans: crown
True or False
Q1: Temporary teeth are also called milk teeth or baby teeth.
Solution:
Ans: True Explanation: The first set of teeth appearing in children around 6 months are called milk teeth, baby teeth, or deciduous teeth.
Q2: Children have premolars in their set of primary teeth.
Solution:
Ans: False Explanation: Children have 8 molars and no premolars in their primary teeth, making a total of only 20 temporary teeth.
Q3: Enamel is harder than bone.
Solution:
Ans: True Explanation: Enamel is white, shiny, and harder than bone. It is the hardest substance in the human body that protects teeth.
Q4: There are four canines in total, two in each jaw.
Solution:
Ans: True Explanation: Canines are sharp and pointed teeth next to incisors, with four canines total-two in the upper jaw and two in lower.
Q5: Sugary foods help to keep teeth healthy and strong.
Solution:
Ans: False Explanation: Sugary foods and drinks produce acid that harms teeth, so they should be avoided to maintain healthy teeth and gums.
Match the Following
Column A
Column B
1. Incisors
A. Hard yellow substance under enamel
2. Molars
B. Sharp and pointed teeth for tearing
3. Enamel
C. Flat teeth with sharp edges for biting
4. Dentine
D. Large flat teeth for grinding food
5. Canines
E. White shiny hardest layer on crown
Solution:
Ans:
1 - C: Incisors are flat teeth with sharp edges located at the front of the mouth, used for biting and cutting food.
2 - D: Molars are large, flat teeth next to premolars, bigger and wider with ridges for chewing and grinding food thoroughly.
3 - E: Enamel is the outermost white, shiny layer covering the crown, harder than bone, protecting the tooth from decay effectively.
4 - A: Dentine is the hard yellow layer located under the enamel and forms the sensitive part of the tooth structure.
5 - B: Canines are sharp and pointed teeth located next to incisors, used specifically for tearing and ripping food items.
Short Answer Questions
Q1: What are temporary teeth and when do they appear?
Solution:
Ans: Temporary teeth are the first set of teeth that appear in children around 6 months of age. They are also called milk teeth, baby teeth, or deciduous teeth. The growth of these teeth can be painful for babies. By age 3, children usually have 20 primary teeth which later get replaced by permanent teeth.
Q2: Describe the function of molars and how many are present in adults.
Solution:
Ans: Molars are large, flat teeth located next to premolars. They are bigger and wider with ridges on their surface. Molars are used for chewing and grinding food properly. Adults have twelve molars in total, with six in each jaw, arranged as three next to each pair of premolars for effective food processing.
Q3: What are the three main layers of a tooth?
Solution:
Ans: The three main layers of a tooth are enamel, dentine, and pulp. Enamel is the outermost white, shiny layer that protects the tooth. Dentine is the hard yellow layer under the enamel. Pulp is the central soft part containing blood vessels and nerves that supply nutrients and nourish the tooth properly.
Q4: Why is it important to brush teeth twice daily?
Solution:
Ans: Brushing teeth twice daily, before breakfast and after dinner, helps prevent plaque formation on teeth. Plaque is a sticky yellow coating caused by germs. These germs produce acid that damages enamel, leading to tooth decay, cavities, toothache, and bad breath. Regular brushing removes food particles and keeps teeth clean and healthy.
Q5: What foods should we eat to keep our teeth strong and healthy?
Solution:
Ans: To keep teeth strong and healthy, we should eat fruits, vegetables, and calcium-rich foods. Calcium-rich foods include green leafy vegetables, yogurt, and milk products. These foods provide essential nutrients that strengthen teeth. We should avoid sugary foods and drinks like sweets, chocolates, pastries, and soft drinks as they harm teeth.
Worksheet with Solutions: The Teeth, study material, pdf , MCQs, practice quizzes, shortcuts and tricks, Free, Worksheet with Solutions: The Teeth, Extra Questions, Viva Questions, Objective type Questions, ppt, Exam, Previous Year Questions with Solutions, past year papers, Semester Notes, mock tests for examination, video lectures, Summary, Sample Paper, Important questions, Worksheet with Solutions: The Teeth;
