Question

Guide Questions:
1. Based on Fig. 1, where
does Earth’s internal heat
come from?

2. How does the heat from the
Earth’s interior reach the
surface?

3. How will you relate Fig. 2 with the convection current in the mantle?

Answer 1

Answer:

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Answer 2

1. Earth's internal heat come from three main sources:

• The heat from when the planet was formed.
• The heat from the decay of radioactive material.
• The heat from core materials sinks into the center of the earth.

2. Heat from the earth's interior reaches the surface by:

• Conduction - Heat energy is transferred through the collision between neighboring atoms or molecules.
• Convection - The transfer of heat energy by the movement of a fluid (liquid or gas) between areas of different temperatures.
• Radiation - The heat energy that comes from a source and travels through space at the speed of light.

3. In the earth's mantle is related to convection current because the core material with higher temperature rises up and relatively lower temperature sinks down as it happens in convection.