Class 9 Science Chapter 13: Earth as a System: Energy, Matter, and Life — practice questions with answers
Free practice for Class 9 Science, Chapter 13: Earth as a System: Energy, Matter, and Life. Try the solved questions below, then take a free test with instant marking and explanations.
56 questions16 easy, 32 medium, 8 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. Which are spheres of the Earth system? (Tick all that apply)
- Geosphere (rocks and soil)
- Hydrosphere (liquid water)
- Cryosphere (ice and snow)
- Exosphere of the Moon
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Answer: A. Geosphere (rocks and soil); B. Hydrosphere (liquid water); C. Cryosphere (ice and snow)
Why: Atmosphere and biosphere are the others. [p.252–253]
Why: Atmosphere and biosphere are the others. [p.252–253]
Q2. Himalayan glaciers and polar ice caps belong to which sphere?
- Cryosphere
- Hydrosphere
- Geosphere
- Biosphere
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Answer: A. Cryosphere
Why: Solid water. [p.253]
Why: Solid water. [p.253]
Q3. A 2 m² solar panel receives 1 kW/m² of sunlight. How much solar power falls on it (kW)?
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Answer: 2 (± 0)
Why: 2 × 1 = 2 kW. [p.255]
Why: 2 × 1 = 2 kW. [p.255]
Q4. Why does a dark road get hotter than a light-coloured pavement in sunlight?
- Dark surfaces have low albedo — they absorb more and reflect less
- Dark surfaces reflect more
- Light surfaces absorb more
- Colour has no effect
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Answer: A. Dark surfaces have low albedo — they absorb more and reflect less
Why: White clothes feel cooler in summer. [p.256]
Why: White clothes feel cooler in summer. [p.256]
Q5. Atmospheric CO₂ rose from about 315 ppm in 1960 to about 420 ppm. By how many ppm did it rise?
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Answer: 105 (± 0)
Why: 420 − 315 = 105 ppm (about 35%). [p.263]
Why: 420 − 315 = 105 ppm (about 35%). [p.263]
Q6. What is a biogeochemical cycle?
- The cyclic movement of matter between living and non-living parts of the Earth
- The life cycle of a frog
- The rotation of the Earth
- The cycle of seasons
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Answer: A. The cyclic movement of matter between living and non-living parts of the Earth
Why: e.g. water, carbon, nitrogen, oxygen cycles. [p.262]
Why: e.g. water, carbon, nitrogen, oxygen cycles. [p.262]
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Frequently asked questions
How many practice questions are there for Class 9 Science Chapter 13: Earth as a System: Energy, Matter, and Life?
56 questions (16 easy, 32 medium, 8 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 9 Science syllabus, used by CBSE and many state boards.