Answer in brief:
1. Write a brief note on the various spheres of the Earth.
Various spheres of the Earth:
1.The Lithosphere is the solid outer part of the Earth.
2.The Hydrosphere is the watery part of the Earth's surface including oceans, rivers, lakes and water vapour.
3.The Atomsphere is a thin layer of gases that surrounds the earth.
4.The Biosphere is the layer of Earth where life exists.
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2. Mention the layers of the interior of the Earth.
3. Define Plate tectonics.
Tectonic Plates:
1.Tectonic plates in Lithosphere are divided into major and minor plates.
2.These plates float over the mantle.
3.The movement of tectonic plates is due to thermal energy from the mantle.
4 Collisions of these plates produce mountain ranges and irregular surfaces
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4. What is Tsunami?
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5. What is a Volcano? Mention its major components.
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6. What is an Earthquake and how it occurs?
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7. What are seismic waves and mention its types?
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8. Write about the Pacific Ring of fire.
Distinguish between
1. Core and crust.
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2. Epicentre and Hypocentre
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3. Divergent and convergent boundaries.
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4. Primary waves and Secondary waves.
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5. Shield volcano and volcanic Dome.
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| Volcanic dome |
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| Shield volcano |
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Write answers in a Paragraph
1. Describe the structure of the Earth.
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2. Write a note on the internal and external
processes of Earth.
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3. How are volcanoes classified based on the periodicity of their eruptions?
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4. Explain the effects of Volcanoes.
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