Layers of the Earth Quiz with essay

The heaviest materials form the thin outer layer of the Earth called the crust.

• True

• False

Tectonic plates are large pieces of the Earth's crust that float on the mantle and are always moving.

• True

• False

The stratosphere of the Earth consists of all rocks including soil and sediments.

• True

• False

The oceanic crust is mostly made of a rock called granite.

• True

• False

The lithosphere includes both the crust and the upper mantle.

• True

• False

What distinguishes the oceanic crust from the continental crust?

• The oceanic crust is primarily granite, while the continental crust is primarily basalt.

• The oceanic crust is primarily basalt, while the continental crust is primarily granite.

• The oceanic crust is thicker than the continental crust.

• The oceanic crust is less dense than the continental crust.

Why do the tectonic plates move?

• Because of gravity.

• Because of friction.

• Because of convection currents in the mantle.

• Because of the Earth's rotation.

How is the Earth's magnetic field important to life on Earth?

• It provides light.

• It shields the Earth from the sun's harmful radiation.

• It helps in navigation.

• It creates weather patterns.

What happens to the temperature as you go from the inner core to the crust?

• It increases.

• It decreases.

• It remains the same.

• It fluctuates.

How does the mantle's semi-molten state affect tectonic plates?

• It allows the plates to float and move.

• It makes the plates denser.

• It causes the plates to sink.

• It has no effect.