Third Quarter Summative Test in Science 8

What is the outermost solid layer of the Earth?

• Mantle

• Crust

• Core

• Lithosphere

Which layer is made up of the crust and the uppermost mantle?

• Asthenosphere

• Lithosphere

• Inner core

• Outer core

Which layer is partially molten and lies beneath the lithosphere?

• Crust

• Asthenosphere

• Inner core

• Outer core

What are the two main types of crust?

• Inner and outer crust

• Continental and oceanic

• Hot and cold crust

• Thick and thin crust

Which type of crust is thinner but denser?

• A. Continental crust

• B. Oceanic crust

• C. Mantle crust

• D. Lithospheric crust

The continental crust is mostly made of which rock?

• Basalt

• Granite

• Sandstone

• Iron

Which type of crust contains basalt and is usually found beneath oceans?

• Continental crust

• Oceanic crust

• Lithosphere

• Inner mantle

Which layer is rigid and broken into moving plates?

• Asthenosphere

• Crust

• Lithosphere

• Outer mantle

Which soft, plastic-like layer allows tectonic plates to move?

• Asthenosphere

• Inner core

• Crust

• Hydrosphere

Which best describes the crust?

• Thick molten iron

• Solid rock forming continents and ocean floors

• Gas-filled material

• Plastic-like molten layer