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D - Science - Ch 9
Energy Conservation
| Question | Answer |
|---|---|
| What are 2 ways to preserve our current energy sources? | increase the efficiency of our energy use and conserve energy whenever possible |
| What is efficiency? | the percentage of energy from a fuel that is actually used to perform work |
| What happens to the energy from a fuel that is not used to perform work? | most of the rest of the energy is "lost" to the surroundings, usually as heat |
| What is the layer of material that helps block the transfer of heat between the air inside and the air outside a building called? | insulation |
| How does insulation work? | it traps air, and the layer of trapped air helps keep the building from losing or gaining heat from the outside |
| What is the best material for insulation? | fiberglass |
| Why do new windows have 2 panes of glass with space between them? | the air between the panes of glass act as insulation to help prevent loss through the windows |
| Which type of light bulb wastes the most energy? | incandescent light bulbs |
| How have engineers improved the energy efficiency of cars? | they have designed better engines and tires |
| How can we reduce the number of cars on the road? | communities can maintain public transit systems and encourage carpooling by setting aside lanes for cars containing 2 or more people |
| What is energy conservation? | reducing energy use |
| How can you reduce your personal energy use? | recycle and walk or ride a bike for short trips |
Created by:
lprinke
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