CBSE Class 4 Science Worksheet - Teeth PDF | PDF - Free Printable

Let's solve the worksheet step by step.

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Q1: Unscramble the words and write the answers.

We are given scrambled words in parentheses, and we need to unscramble them based on the clues.

a. The soft part of the tooth with nerves and blood vessels
Scrambled: (lupp)
Unscrambled: Pulp
✔ *Explanation:* The pulp is the soft inner part of the tooth containing nerves and blood vessels.

b. The hardest part of the teeth
Scrambled: (leemna)
Unscrambled: Enamel
✔ *Explanation:* Enamel is the hard outer layer of the tooth.

c. The tearing teeth
Scrambled: (enncias)
Unscrambled: Canines
✔ *Explanation:* Canine teeth are pointed and used for tearing food.

d. Teeth doctor
Scrambled: (ttisden)
Unscrambled: Dentist
✔ *Explanation:* A dentist is a doctor who treats teeth.

e. Harmful germs that act on the food particles stuck between the teeth
Scrambled: (aatrecbi)
Unscrambled: Bacteria
✔ *Explanation:* Bacteria in the mouth feed on food particles and produce acid, causing decay.

f. A yellow substance formed on the teeth
Scrambled: (apluqe)
Unscrambled: Plaque
✔ *Explanation:* Plaque is a sticky, yellowish film of bacteria that forms on teeth.

g. Four broad, flat teeth used for grinding/chewing
Scrambled: (amolr)
Unscrambled: Molars
✔ *Explanation:* Molars are large, flat teeth at the back of the mouth used for grinding food.

h. Cutting teeth
Scrambled: (iicnsor)
Unscrambled: Incisors
✔ *Explanation:* Incisors are the front teeth used for cutting food.

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✔ Q1 Answers:

a. Pulp
b. Enamel
c. Canines
d. Dentist
e. Bacteria
f. Plaque
g. Molars
h. Incisors

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Q2: Read the given sentences. Then answer the questions in a few words.

> Jaya is 13 years old. Her baby brother Yash is 3 months old.

a. What type of teeth does Jaya have?
→ Permanent teeth
✔ *Explanation:* By age 13, most children have started losing their baby teeth and growing permanent ones.

b. Which type of food can Yash have?
→ Milk / Liquid food
✔ *Explanation:* At 3 months old, babies only have milk as food; they don’t have teeth yet.

c. Which type of teeth will Yash have when he will be 3 years old?
→ Milk teeth / Baby teeth
✔ *Explanation:* By age 3, children usually have all 20 primary (baby) teeth.

d. Why should Jaya visit her dentist regularly?
→ To keep teeth healthy / Prevent cavities
✔ *Explanation:* Regular check-ups help detect problems early and maintain oral hygiene.

e. What type of food should Jaya eat to keep her teeth strong?
→ Calcium-rich foods / Milk, cheese, vegetables
✔ *Explanation:* Foods rich in calcium and phosphorus strengthen teeth. Also, limiting sugary foods helps prevent decay.

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✔ Q2 Answers:

a. Permanent teeth
b. Milk / Liquid food
c. Milk teeth
d. To keep teeth healthy / Prevent cavities
e. Calcium-rich foods (e.g., milk, cheese, vegetables)

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✔ Final Answer Summary:

#### Q1:
a. Pulp
b. Enamel
c. Canines
d. Dentist
e. Bacteria
f. Plaque
g. Molars
h. Incisors

#### Q2:
a. Permanent teeth
b. Milk / Liquid food
c. Milk teeth
d. To keep teeth healthy / Prevent cavities
e. Calcium-rich foods

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