7th gr Unit 4 The Dynamic Earth

What is current about convection currents?

• Convection currents in magma are caused by color differences.

• Convection currents in magma drive the movements of tectonic plates.

• Currents in magma play a role in the movement of earth inner core.

• Convection currents only happen in the core.

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NGSS.MS-ESS2-2

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Plate tectonics is a theory that explains.........

• why the outer layers of the move and change

• is a law.

• gives a precise prediction of the direction of plates.

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NGSS.MS-ESS2-3

What type of boundary is it and what is happening?

• A rift valley is forming, subduction boundary.

• This a transform boundary.

• This is a convergent boundary, subduction.

• This is a divergent boundary

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NGSS.MS-ESS2-2

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What type of boundary is this?

• transform

• convergent

• divergent

• seismic wave

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If we are not able to see the inside of the earth, how do Scientist know that it has layers made of different densities and materials?

• Earth's liquid inner core creates a magnetic field

• Earth's core can be studied directly by drilling into the crust

• Materials that make up Earth's layers all have the same densities

• Scientist measure seismic wave time and data to study the Earth's Structure.

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NGSS.MS-ESS2-1

Describe the Earth's Core.

• Liquid inner core

• it has magma convection currents

• It is a solid outer core

• It has a liquid outer core that lies above the Earth's Solid inner core.

Which is true about volcanic eruptions.

• Convection currents in the mantle cause magma to rise the the surface.

• Volcanoes store nuclear energy

• Magma erupts from volcanoes because the rocks around it become weak.

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NGSS.MS-ESS2-2

The Earth's tectonic plates are made up of .......

• outer core and upper mantle

• mantle and crust

• upper mantle and crust

What is responsible for creating new crust formation

• Seafloor spreading along the mid-ocean ridge, divergent boundaries.

• Seafloor spreading do to convergent boundaries.

• Seafloor spreading happens in subduction zones.

What is true about earthquakes and volcanoes?

• Earthquakes are common, volcanoes are rare.

• The only happen in the center of a plate

• Volcanic activity can cause earthquakes

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NGSS.MS-ESS3-2