Layers of the Earth and Continental Drift Review

Convection currents in the earth's mantle spreads two layers apart. Magma rises through the crack and forms new oceanic crust. This process is called...

• Sea-Floor Spreading

• Plate Tectonics

• Continental Drift

• The Rock Cycle

The mantle of Earth is made of a plastic like material that when its heated, the material rises, cools, sinks and is then re-heated.  This constant flow of a fluid is called

• a conduction current
• a hot spot
• a volcanic eruption
• a convection current

Tags

NGSS.MS-ESS2-1

According to Wegener's hypothesis of continental drift,

• Earth is shrinking
• The continents do not move, they only appear to drift.
• The Earth once had great land bridges that connected the continents.
• The continents were once joined and have since drifted apart.

Tags

NGSS.MS-ESS2-3

How would you describe the outer-core?

• liquid nitrogen
• liquid iron-rich
• solid iron-rich
• neither liquid nor solid, but plastic like layer

Tags

NGSS.MS-PS1-4

The Earth is made up of two types of crust.  Which is more dense?

• Oceanic crust -basalt
• Oceanic crust- granite
• Continental crust- granite
• continental crust- basalt

Which layer of Earth makes up the crust and the upper most part of the mantle.  This is the rigid layer that is broken into sections called plates.

• Crust
• Lithosphere
• Asthenosphere
• Mantle

Tags

NGSS.MS-ESS2-3

Which statement best explains the idea of continental drift?

• All of the continents drift on top of the ocean. Sometimes they bump into each other and form a supercontinent called Pangaea.

• Pangaea broke apart into continents about 200 million years ago. Those continents drifted to their current positions.

• 300 million years ago, a rift opened in the middle of the Atlantic Ocean. This rift pushes the continents away from each other.

• Magma rises from a mid-ocean ridge. Continents drift on top of this magma. New sea floor forms in places where there are no continents.

Which of the following facts about Glossopteris best supports continental drift? (Select all that apply.)

• Glossopteris was a plant that grew in a warm climate.

• Glossopteris grew heights of up to 30 meters.

• Glossopteris was a seed-bearing fern with very large leaves.

• It is a plant fossil that can be found in Australia, Antarctica, India, Africa, and South America.

Which of the following happens in a convection current? (Select 2 Answers.)

• Hot, less dense rock rises.

• Hot, dense rock sinks

• Cool, dense rock sinks

• Cool, less dense rock rises

What are the two types of crust

• continental and oceanic
• ocean and upper
• lower and upper
• pizza and subway