THE GEOSPHERE I

1. Look at the picture. This plate boundary shows subduction.

True

False

Subduction: one tectonic plate (oceanic crust) moves under another tectonic plate (continental crust) and sinks into the mantle as the plates converge

Explanation

Subduction: one tectonic plate (oceanic crust) moves under another tectonic plate (continental crust) and sinks into the mantle as the plates converge

2. Which of the following are layers of our planet? (Multiple answer).

Biosphere.

Cromosphere.

Geosphere.

Atmosphere.

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3. These are...

Volcanic islands.

Ridges.

Trenches.

4. The Earth's core is molten.

True

False

The Earth's core is divided in two parts: the outer core (liquid) and the inner core (solid).

Explanation

The Earth's core is divided in two parts: the outer core (liquid) and the inner core (solid).

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6. Irregularities on the surface of the geosphere are called...

Mountains ranges.

Continental platforms.

Relief.

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8. Look at the picture and label it.

A

B

C

D

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9. Mark the correct statements about the lithospehre.

It is a continuous layer.

It is divided in lithospheric or tectonic plates.

It floats in the astenosphere.

It is made up of crust and part of the upper mantle.

The lithosphere is an outer layer of the geosphere, combination of crust and the upper part of the mantle.
It is fragmented.
And it is floating in the mantle, the astenosphere is not considered a continuous layer anymore.

Explanation

The lithosphere is an outer layer of the geosphere, combination of crust and the upper part of the mantle.
It is fragmented.
And it is floating in the mantle, the astenosphere is not considered a continuous layer anymore.

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The Geosphere I