20.5: Earth's Energy- Challenge 1
- Page ID
- 5614
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- 1. An idle ball on a hilltop, though not moving, contains ___.
- potential energy
- 2. When we kick a soccer ball, potential energy gets converted into ___.
- kinetic energy
- 3. Energy ___ describes how much useful work is extracted from one unit of energy.
- efficiency
- 4. ___ is the amount of useable energy available in a resource after accounting for the amount of energy needed to make that energy available.
- Net energy
- 5. To be energy efficient at home, ___.
- make sure your home is well-insulated, replace incandescent bulbs with compact fluorescent bulbs, and turn off the heating/AC when not at home
- 6. Energy conservation can be achieved through ___ energy use.
- efficient
- 7. Wind and moving water are sources of ___ energy.
- renewable
- 8. ___ energy, while renewable, is not totally environmentally friendly.
- Biomass
- 9. Renewable energy sources self-replenish ___ than they can be used up.
- more quickly