Rocks and Layers of the Earth

Which layer of Earth is solid and why?

• The inner core is solid because of movement of the outer core.

• The inner core is solid because of the freezing temperatures.

• The inner core is solid because of the extreme pressure from the other layers.

• The outer core is solid because of the extreme pressure from the other layers.

Which of Earth's layers is made of SOLID iron and nickel?

• crust 

• mantle

• outer core

• inner core

What layer of Earth contains the plates that cause earthquakes and volcanic eruptions?

• The asthenosphere which is solid with the core.

• The asthenosphere which contains the crust and mantle.

• The lithosphere which contains the crust and outer core.

• The lithosphere which contains the crust and upper mantle.

Tags

NGSS.MS-ESS2-3

The diagram shows the basic materials and processes involved in the rock cycle. Which process is involved in breaking down solid rock and turning it into sediment?

• compaction

• melting

• cementation

• weathering

Tags

NGSS.MS-ESS2-2

Rocks are made of minerals, and they are formed in different ways. According to the diagram above, how are sedimentary rocks formed?

• Molten rock cools and turns solid.

• Wastes deposited by plants and animals decompose and weather.

• Other rocks experience intense heat and pressure.

• Sand and other particles are buried, compacted, and cemented together.

According to the diagram, how are metamorphic rocks formed?

• Molten rock cools and turns solid.

• Other rocks experience intense heat and pressure.

• Sand and other particles are buried, compacted, and cemented together.

• Wastes deposited by plants and animals decompose and weather.

Granite has only recently been exposed at a location on Earth’s surface. What will need to happen first in order for soil to eventually form in this location?

• A thick layer of humus must form on top of the granite.

• The granite must be broken into smaller pieces by weathering processes.

• Erosion by wind and water must move pieces of granite to other locations.

• Microorganisms must begin to break down the remains of plants and animals.

Which layer of Earth is the least dense?

• crust

• inner core

• outer core

• mantel

Where does magma form?

• asthenosphere

• crust

• lithosphere

• mantle

This layer is the innermost layer of the Earth.

• Crust

• Mantle

• Outer Core

• Inner Core