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- 1. Multiple Choice
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
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
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
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
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
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.
- 7. Multiple Choice
What is the role of convection currents in the movement of tectonic plates?
Convection currents pull the tectonic plates and cause their movement.
Convection currents have no role in the movement of tectonic plates.
Convection currents push the tectonic plates and cause their movement.
Convection currents only affect the temperature of the tectonic plates.
- 8. Multiple Choice
What effects do convection currents have on the crust?
They cause the crust to move which can result in various geological phenomena such as earthquakes, volcanic eruptions, and mountains.
They cause the crust to become smoother or more rigid over time.
They lead to the formation of oceans and discoveries of new never before seen life forms.
They have no effect on the crust, only the mantle.
- 9. Multiple Choice
Which is an example of convection happening in the world?
Cooling off a cup of hot coffee by blowing on it
Melting of ice cubes in a glass of water
Lighting a candle wick which causes the wax to melt around it
Rising of hot water and sinking of cold water in a boiling pot
- 10. Multiple Choice
If two convection currents next to each other are both rotating to the right, how will the crust above them move?
To the left
They will separate
They will come together
To the right
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