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Chapter 9 Review
Energy and Energy Resources Test Review
| Question | Answer |
|---|---|
| How do you calculate kinetic energy? | mass times velocity squared divided by 2 |
| How do you calculate gravitational potential energy? | weight times height |
| What units are used for Energy? | Joules |
| What are some examples of renewable resources? | water, wind energy, solar energy, geothermal energy |
| What best describes fossil fuels? | energy resources that formed from the buried remains of plants and animals; a nonrenewable resource |
| Converts chemical energy to electrical energy | battery |
| What happens when electrical energy is changed to thermal energy? | an energy conversion takes place |
| When a bat hits a baseball, what is transferred from the bat to the ball? | energy |
| As a softball flies through the air after being hit, which type of energy does it have? | kinetic energy |
| After energy conversions, you end up with the same total amount of energy as the originial amount of potential energy. Which law explains this rule? | Law of Conservation of Energy |
| Anytime an energy conversion takes place, some of the originial energy is converted to what? | thermal/heat energy |
| What is found when you compare the amount of energy before a conversion with the amount of energy present after a conversion? | energy efficiency |
| What is a force that opposes motion between two surfaces that are touching? | friction |
| When is the potential energy the greatest in any roller coaster ride? | at the top of the first hill |
| The energy an object has because of its motion | kinetic energy |
| The energy that is dependent on an object's height above the surface of the Earth | gravitational potential energy |
| The energy of moving electrons | electrical energy |
| The ability to do work | energy |
| The heat energy that is produced by the internal motion of particles | thermal/heat energy |
| The energy caused by an object's vibrations | sound energy |
| The energy an object has because of its position | potential energy |
| The electromagnetic radiant energy that is produced by vibrations of charged particles | light energy |
| The total energy of motion and position of an object | mechanical energy |
| Describe the energy conversions in a hair dryer | electrical to thermal/heat energy and sound energy |
| What are some examples of nonrenewable resources? | coal, petroleum and natural gas |
| Describe the energy conversions in a roller coaster | PE is the greatest at the top of the first hill. KE at the bottom of the first hill is less than the PE at the top was. PE at the top of the second hill is less than the KE and PE from the first hill. |
| Describe the energy conversion for an alarm clock | electrical energy to light and sound energy |
| Describe the energy conversion for a light bulb | electrical energy to light and thermal energy |
| Describe the energy conversion for a blender | electrical energy to kinetic and sound energy |
Created by:
lbeazlietms
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