Class 7 Science

Chapter 10: Respiration in Organisms

MCQs and Practice Worksheet

Part A: Multiple Choice Questions (MCQs)

Q1. Respiration is the process of:

A. Breathing only
B. Releasing energy from food
C. Eating food
D. Digestion

Answer: B

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Q2. Which gas is required for aerobic respiration?

A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Hydrogen

Answer: C

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Q3. Which gas is released during respiration?

A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen

Answer: C

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Q4. Which respiration takes place without oxygen?

A. Aerobic respiration
B. Anaerobic respiration
C. Breathing
D. Photosynthesis

Answer: B

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Q5. Which organ helps fish to breathe?

A. Lungs
B. Skin
C. Gills
D. Spiracles

Answer: C

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Q6. Tiny air sacs in human lungs are called:

A. Bronchi
B. Alveoli
C. Trachea
D. Spiracles

Answer: B

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Q7. Which organism respires through its skin?

A. Fish
B. Frog
C. Earthworm
D. Insect

Answer: C

Part B: Practice Worksheet

1. Fill in the blanks:

• Respiration releases __________ from food.
• __________ respiration needs oxygen.
• Fish breathe through __________.
• Insects breathe through __________.

2. Very Short Answer:

(a) What is respiration?
(b) Name the gas used in respiration.
(c) Name one organism that breathes through skin.

3. Short Answer:

(a) Difference between breathing and respiration.
(b) What is aerobic respiration?
(c) Write two organs involved in human respiration.

4. Long Answer:

Explain respiration in humans with the help of a diagram.

Answer Key (For Teachers & Parents)

Fill in the blanks:

• Energy
• Aerobic
• Gills
• Spiracles

Very Short Answers:

• Process of releasing energy from food
• Oxygen
• Earthworm

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Shaktimatha CBSE Learning
Class 7 Science – Chapter 10: MCQs & Worksheet

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