6th Chapter 8

The outermost solid layer of Earth

• Crust

• Mantle

• Core

The outer part of this is solid and the inner part is so hot that the rock can flow very slowly over time.

• Crust

• Mantle

• Core

The innermost part of Earth

• Crust

• Mantle

• Core

The Earth’s crust and the upper part of the mantle are called

• lithosphere

• Pangaea

• convection

• fault

Earth’s lithosphere is broken into about ____ moving plates. The continents and the ocean floor make up the surfaces of these moving plates.

• 10

• 20

• 30

• 40

The theory that continents drifted apart in the past and continue to do so today.

• Tectonic plates

• Seafloor spreading

• Continital drift

• Convection currents

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NGSS.MS-ESS2-3

In 1912 Alfred Wegener thought that about 225 million years ago that all the continents were joined in one large continent he called ____ (meaning “all Earth”).

• Convection

• Lithosphere

• Tectonic

• Pangaea

When magma, which is molten rock, pushes up through Earth’s crust. As the magma cools, it forms a new crust.

• Convection currents

• Seafloor spreading

• Plate boundaries

• Fracture boundaries

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

The force that moves Earth’s plates.

• Convection

• Fault

• Lithosphere

• Spreading seafloor

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NGSS.MS-ESS2-3

Earth’s plates move in a continuous process in different directions- away from, alongside, or toward each other. Scientists can figure out how the plates move by receiving radio signals from _________.

• Seismometer

• GPS

• Tiltmeter

Tags

NGSS.HS-ESS1-5