Convection Currents and their Effects

Convection Currents and their Effects

Assessment

Assessment

Created by

Lauren Sabath

Science

8th Grade

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10 questions

Show answers

1.

Multiple Choice

5 mins

1 pt

What are convection currents?

Vertical (up and down) movements of solid rock in the Earth's mantle caused by heat transfer.

Horizontal (right and left) movements of molten rock in the Earth's core caused by gravitational forces.

Circular movements of molten rock in the Earth's mantle caused by heat transfer.

Circular movements of molten rock in the Earth's crust caused by tectonic plates.

2.

Multiple Choice

5 mins

1 pt

Where does the heat come from needed to create convection currents?

Heat is generated from chemical reactions in the mantle

Heat is generated from the inner core

Heat is generated from the outer core

Heat is generated from the friction of solid and liquid rocks in the mantle

3.

Multiple Choice

5 mins

1 pt

How do convection currents transfer heat in the asthenosphere?

The sun heats up the magma through radiation which causes it to rise and sink.

Hot magma rises and cooler magma sinks due to differences in density.

The magma touches the inner core of Earth through conduction which heats it up and causes differences in density.

Cold magma rises and hot magma sinks due to differences in density.

4.

Multiple Choice

5 mins

1 pt

Where is the MORE dense magma/liquid material found in asthenosphere?

Towards the bottom of the layer

Towards the top of the layer

All of the liquid is the same density no matter what

We do not have enough information on this process to know

5.

Multiple Choice

5 mins

1 pt

Where is the LESS dense magma/liquid material found in asthenosphere?

Towards the bottom of the layer

Towards the top of the layer

All of the liquid is the same density no matter what

We do not have enough information on this process to know

6.

Multiple Choice

5 mins

1 pt

What is the role of gravity in convection?

Gravity has no role in convection.

Gravity only affects solids in convection.

Gravity causes convection to stop.

Gravity causes fluids to circulate in convection.

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