unit 3 les 1 social 6

What is the outer layer of rock called?

• Outer core

• Inner core

• Mantle

• Crust

What is the Earth's crust made of?

• Molten rock

• Burning gases

• Liquid form

• Hardened layer

What is the thickness of the Earth's crust?

• 2,000 km

• 40 km

• 2,900 km

• 1,200 km

What is the layer that is solid towards the crust and molten deeper down?

• Inner core

• Mantle

• Crust

• Outer core

What is the layer of molten rock about 2,000 km thick?

• Mantle

• Inner core

• Crust

• Outer core

What is the inner center of the Earth believed to be made of?

• Solid rock

• Molten iron

• Molten rock

• Iron

What causes earthquakes?

• Tectonic shifts

• Volcanic eruptions

• Storms

• Plate movement

What are the boundaries between the plates on Earth called?

• Fault lines

• Tectonic boundaries

• Epicenters

• Plate boundaries

What is the weak place between two plates known as?

• Tectonic line

• Plate line

• Fault line

• Epicenter

What is the area prone to earthquakes known as?

• Epicenter zone

• Seismic belt

• Ring of Fire

• Tectonic zone