8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
More to the Mantle Than Meets the Eye…
Is the mantle a solid or liquid?
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Describe the lithosphere:
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Over thousands of years what can the
asthenosphere do?
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The mesosphere is (more/less) rigid than the
other layers of the mantle?
Fill in the diagram of
the mantle below:
8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
Convection Currents
Purpose: To create a model of convection currents.
Materials:
1 Plastic Tub
4 Empty Styrofoam Cup
Food dye
Dropper
1 Styrofoam Cup w/Hot Water
Hypothesis:
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Procedure:
1. Place plastic bin on the Styrofoam cups so
it is stable.
2. Place cup with hot water below the middle
of the bin
3. Place a drop of food dye directly above heat
source (red) and one near the side (blue).
4. Record your observations below.
Observations:
1. Draw a diagram of the movement of the drops below:
2.
Which way did the water over the heat source move?
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8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
3.
What happened to the water once it reached the surface?
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4. What happened to the water when it reached the edge?
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5. Which way does the water move along the surface of the bin?
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Conclusion:
Compare the model that you just created with a convection current in earth’s mantle. Explain what each part
of the model would represent in the earth and explain how the movement of water was similar to the
movement of rock in the mantle.
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8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
The diagram below shows a convection cell in Earth’s mantle. A convection cell is one complete loop of
convection current. Use the diagram to answer the questions that follow on a separate sheet.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Where does the heat come from that drives this convection currint in the mantle?
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Where is the temperature of the mantle material greater, at point A or point B? Explain why.
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Where is the density of the material greater, at point B or point C? Explain why.
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What causes the convection cell to turn to the left at point B?
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What happens to the temperature and density of the material between point B and C?
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What force causes the convection cell to turn at point C?
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What happens to the temperature and density of the material between D and A?
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What causes the convection cell to turn up at point A?
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How do you think the convection cell might affect the crust material above it?
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8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
8th Science
Name: _________________________
Name: _______________________________
Unit 1: Scientific Method
Mr. Cullen
Class Work
Date: _________________________
Date: ___________________
First, draw and label all of the following: Crust, Mantle, Inner Core, Outer Core.
Second, draw a convection cell in the correct layer and label it.