1. Name the different types of forces.
2. What are simple machines?
3. Why is geothermal energy referred to as a renewable source of energy?
4. From where does most of the heat energy come?
5. Name four different forms of energy.
Answers
Answer:
1) Applied Force.
Gravitational Force.
Normal Force.
Frictional Force.
Air Resistance Force.
Tension Force.
Spring Force.
2) Any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.
3) Because its source is the almost unlimited amount of heat generated by the Earth's core. Even in geothermal areas dependent on a reservoir of hot water, the volume taken out can be reinjected, making it a sustainable energy source.
4) The Sun radiates huge amounts of energy. Only a small portion of that energy hits the Earth, but it is enough to light our days, heat our air and land, and create weather systems over the oceans. Most of the energy you will learn about comes from the Sun. The Earth also gives off energy.
5) Solar energy
Wind energy
Wave energy
Thermal energy
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