Question Paper
Class / Subject: Class 8 (CBSE) · Science
Chapter: Chapter 13 — Chapter 13: Our Home: Earth, a Unique Life-Sustaining Planet
Time Allowed: 15 minutes
Max Marks: 6
1. Liquid water existing on Earth is mainly due to: [1]
(A) its distance from the Sun
(B) its size only
(C) its colour
(D) its rotation speed only
2. The ozone layer protects Earth from: [1]
(A) harmful ultraviolet radiation
(B) visible light
(C) gravity
(D) magnetism
3. Earth's magnetic field is generated by its: [1]
(A) molten iron core
(B) atmosphere
(C) ocean
(D) crust
4. Deforestation mainly leads to: [1]
(A) disrupted ecosystems and reduced oxygen production
(B) increased oxygen production
(C) improved wildlife habitats
(D) no environmental effect
5. Overfishing is an example of: [1]
(A) overexploitation of a resource
(B) sustainable resource use
(C) pollution control
(D) reforestation
6. Human-caused greenhouse gas emissions are a major driver of: [1]
(A) climate change
(B) increased biodiversity
(C) ozone layer thickening
(D) reduced sea levels