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Questions and Answers
What is the main cause of plate movement according to the text?
What is the main cause of plate movement according to the text?
- Gravitational pull from the moon and the sun
- Friction between the mantle and the crust
- Radioactive decay of uranium and other elements (correct)
- Magnetic forces from the earth's core
What is the composition of the earth's mantle, as described in the text?
What is the composition of the earth's mantle, as described in the text?
- Nickel, copper, zinc, and lead
- Carbon, nitrogen, hydrogen, and helium
- Oxygen, silicon, magnesium, and iron (correct)
- Aluminum, calcium, sodium, and potassium
What is the role of convection currents in plate movement, as per the text?
What is the role of convection currents in plate movement, as per the text?
- Causing the plates to smash into each other
- Cooling the rock near the surface and causing it to sink toward the core
- Heating the rock near the mantle and causing it to rise toward the crust (correct)
- Pushing the plates under another plate
What causes the flowing down the ridge and gives the plate a slight push along, as described in the text?
What causes the flowing down the ridge and gives the plate a slight push along, as described in the text?
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How are converging boundaries identified, according to the text?
How are converging boundaries identified, according to the text?
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What is the upper part of the mantle called where the plates ride along?
What is the upper part of the mantle called where the plates ride along?
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How thick can continental plates be, according to the text?
How thick can continental plates be, according to the text?
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What is the theory that the surface of the earth is broken into larger pieces of crust called?
What is the theory that the surface of the earth is broken into larger pieces of crust called?
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What do geologists study?
What do geologists study?
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What is the average thickness of oceanic plates, as per the text?
What is the average thickness of oceanic plates, as per the text?
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