1. Marshy areas have trees called
Ans: c. Mangroves
2. Some animals hibernate in
Ans: b. Winter
3. Vitamin ___ keeps the eyes and skin healthy.
Ans: a. A
4. Sweets and chocolates ___ our teeth.
Ans: a. Spoil
B. Fill in the blanks:
1. Hydrilla is a submerged aquatic plant.
2. Animals living in trees are called arboreal animals.
3. Saliva softens food in our mouth.
4. Microbes are very tiny things.
C. Write ‘T’ for true or ‘F’ for false statements:
1. Sunrays provide light energy. — T
2. The Sunderbans is a marshy land. — T
3. Butterflies complete their life cycle in three stages. — F
4.Every adult has a set of 36 teeth. — F
D. Answer the following questions:
1. Why are plants called producers?
Ans:
Plants are called producers because they make their own food by the process of photosynthesis using sunlight, air, and water.
2. What are germs?
Ans:
Germs are tiny living organisms that cause diseases. They cannot be seen with naked eyes.
3. How do animals adapt themselves?
Ans:
Animals adapt themselves by developing special features such as body shape, colour, food habits, and shelter to survive in their surroundings.
4. What is digestion? Why do we need to digest food?
Ans:
Digestion is the process of breaking down food into simpler substances.
We need digestion so that our body can absorb nutrients for energy, growth, and repair.
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