Earths Internal Structure and Geological Time

1. Which layer of the Earth is known as Sial?

  1. Mantle
  2. Crust
  3. Outer Core
  4. Inner Core
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Answer: Option B. Crust

2. Which type of rock is commonly found in the Oceanic crust?

  1. Basalt
  2. Granite
  3. Sandstone
  4. Limestone
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Answer: Option A. Basalt

3. What forms the outermost solid layer of the Earth?

  1. Hydrosphere
  2. Mesosphere
  3. Atmosphere
  4. Lithosphere
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Answer: Option D. Lithosphere

4. What does the Lithosphere consist of?

  1. Outer Core only
  2. Mesosphere and Lower Mantle
  3. Crust and Upper Mantle
  4. Inner Core and Outer Core
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Answer: Option C. Crust and Upper Mantle

5. What is the densest layer of the Earth called?

  1. Mantle
  2. Inner Core
  3. Crust
  4. Outer Core
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Answer: Option B. Inner Core