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Earth as a System: Energy, Matter and Life
Science · CBSE Class 9 · English Medium · 18 questions and answers
Sample questions
- Q: Name the five interacting spheres that make up the Earth system.
- A: Geosphere, hydrosphere, atmosphere, biosphere and cryosphere.
- Q: What is the geosphere?
- A: The solid part of the Earth — its rocks, soil, landforms and the interior below the surface.
- Q: What does the cryosphere include?
- A: All the frozen water on Earth, such as glaciers, polar ice caps, sea ice and snow.
- Q: What is the primary source of energy for the Earth system?
- A: The Sun, which supplies solar energy that drives weather, ocean currents and life.
- Q: Besides the Sun, what two internal sources add energy to the Earth system?
- A: The heat of Earth's hot interior and the energy released by chemical reactions in air, water and rocks.
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