UNIT 1 - Tectonic Hazards

Name the layer of the earth that includes the crust and the top layer of the upper mantle.

• asthenosphere

• lithosphere

Name the layer of the earth that is a dense and mobile layer in the upper part of the mantle.

• lithosphere

• asthenosphere

Which layer of the earth is the largest?

• crust

• mantle

• inner core

• outer core

Why is the inner core solid?

• because the centre of the earth is so hot

• due to enormous pressure

Which layer do the tectonic plates float on?

• lithosphere

• asthenosphere

• inner core

• outer core

The lithosphere is solid, whereas the asthenosphere is more like thick porridge

• True

• False

Select two statements which apply to oceanic crust.

• oceanic crust is THINNER than continental crust

• oceanic crust is THICKER than continental crust

• oceanic crust is DENSER / HEAVIER than continental crust

• oceanic crust is LIGHTER than continental crust

Which process happening inside the earth makes the core so hot?

• convection currents

• mass movement

• uplifting

• radioactive decay

Which process, which occurs in the mantle, causes the tectonic plates move?

• mass movement

• radioactive decay

• convection currents

• uplifting

What evidence is there that the inside of the earth is extremely hot? (SELECT TWO)

• people have dug down the centre of the earth and measured the temperature of the core

• molten lava spewing from volcanoes

• people have made a thermometer long enough to measure the temperature of the earth's core!!!

• hot springs and geysers