Density is a measure of...................?

How much mass there is in a volume of substance

What happens to the convection current (CC) when the heat source is removed?

CC eventually stops when everything reaches the same temp

What is a convection current?

A current in a fluid that results from convection

How do you think this convection cell might affect the crust material above it?

It will cause the crust to move

Where is the temperature of the mantle material greater, at point A or point B?

A, because the material is closer to the heat source

What causes the convection cell to turn to the left at point B?

Crust is in the way + rising magma pushes magma at B to side

Where is the density of the material greater, at point B or point C?

C, because the material will be cooler than B

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Convection Currents

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Earth and Space Science: Quiz on convection currents and convection cells in the mantle.

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Questions 14

Answers

1
Density is a measure of...................?
Volume
How much mass there is at a certain depth
Weight
How much mass there is in a volume of substance
2
What causes the convection cell to turn up at point A?
Heat from the core
Heat from the mantle
Gravity
Heat from the crust
3
What happens to the convection current (CC) when the heat source is removed?
The CC changes direction
CC eventually stops when everything reaches the same temp
The CC stops straight away
The CC is not affected
4
What is a convection current?
When particles become more dense
The current in a solid that results from convection
When particles become less dense
A current in a fluid that results from convection
5
How do you think this convection cell might affect the crust material above it?
It will not affect the crust
It will make the crust hotter
It will cause the crust to move
It will make the crust melt
6
What happens to a fluid when its temperature decreases?
The particles rise
The particles move faster
It boils
Its density increases
7
Where are convection currents found?
All of the above
When you cook soup in a sauce pan
In a boiling kettle
In the mantle
8
Look at the diagram- What is the heat source that drives convection currents in the mantle?
Heat from the mantle
Heat from the core
Heat from the crust
Heat from the Lithosphere
9
What other force acts on the mantle to create the convection current movement?
Gravity
Air resistance
Magnetic
Spring
10
What happens to a convection current when the fluid reaches a constant temperature?
They do the time warp
They continue
Nothing happens
They stop
11
Where is the temperature of the mantle material greater, at point A or point B?
A, because the material is closer to the heat source
B, because the material is closer to the crust
A because the material is moving faster
B, because the material is moving faster
12
What causes the convection cell to turn to the left at point B?
The crust is in the way
The material becomes cooler so stops rising
Crust is in the way + rising magma pushes magma at B to side
Rising magma pushes magma at B to the side
13
What happens to a fluid when its temperature increases?
Its particles occupy less space.
The particles descend
Its density decreases.
Its particles move more slowly.
14
Where is the density of the material greater, at point B or point C?
C, because the material will be hotter than B
B, because the material will be hotter than C
B, because the material will be cooler than C
C, because the material will be cooler than B

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