Our Changing Earth

Which of Earth's layers is found at the center, is the hottest layer, and is made of solid metal?

• crust
• mantle
• inner core
• outer core

What is the thickest, middle layer of the Earth called?

• crust
• mantle
• outer core
• inner core

What is the thinnest, outermost layer of Earth called?

• crust
• mantle
• outer core
• inner core

The mantle is made of hot, soft rock called...

• lava
• magma
• plates
• faults

An opening in Earth's crust through which lava flows is called ...

• an earthquake
• the mantle
• a volcano
• a mountain

Earth's crust is broken up into several large rocky pieces called ...

• plates
• faults
• fossils
• puzzle pieces

Large cracks where the pieces of Earth's crust move (bend or break) are called...

• plates
• valleys
• volcanoes
• faults

When Earth's plates rub or scrape against one another, the release of energy causes ...

• a volcano
• an earthquake
• a tornado
• continental drift

What is the layer of air that surrounds the Earth called?

• stratosphere
• hydrosphere
• atmosphere
• oxygen

What is the layer of water that covers the Earth called?

• hydrosphere
• atmosphere
• oceans
• lakes