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Kinetic energy depends on
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Gravitaional potential energy depends on
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Test 1 !<33
Energy and Energy Resources
| Question | Answer |
|---|---|
| Kinetic energy depends on | speed and mass |
| Gravitaional potential energy depends on | weight and height |
| What is an example of something that is not a renewable resource | nuclear energy |
| What are some renewable resources | wind energy ; solar energy ; geothermal energy |
| What is a conversion from chemical energy to thermal energy | Food is digested and used to regulate body temperature. Charcoal is burned in a barbecue pit. Coal is burned to boil water. |
| Machines can | Transfer energy and convert energy |
| In every energy conversion, some energy is always converted into | Thermal energy |
| An object that has kinetic energy must be | in motion |
| What is an example of something that isnt a fossil fuel | firewood |
| What are some examples of fossil fuels | gasoline, coal, and natural gas |
| What is an example of something that is not an energy source | an electric generator |
| What are some examples of energy sources | falling water ; plant matter |
| The kinetic energy of an object can be found if the object's ____ are known. | speed and mass |
| Thermal energy : | a measure of particle motion |
| electrical energy : | the energy of moving electrons |
| light energy : | the result of vibrations electrically charged particals |
| When one object does woek on another, energy is | transferred |
| Because woek and energy are so closely related, they are both expressed in | joules |
| ____ is sotred in a stretched rubber band | potential energy |
| At what point does a roller coaster have the greatest potential | the top of the biggest hill |
| When rolling downhill, a roller coasters potential energy is converted into | kinetic energy |
| The cleanest burning fossil fuel is | natural gas |
| The United States' primary source of electrical energy is generated by | burning fossil fuels |
| Petroleum was formed from the remains of ____ that were in shallow prehistoric lakes and seas. | organisms |
| ____ is electrical energy produced from falling water. | hydroelectricity |
| ____ is a well-defined group of objects that transfer energy between on another. | closed system |
| Organic matter that can be burned to release energy is called ____. | biomass |
| ____ is the result of heating the earth's crust | geothermal |
| ____ can be used and replaced in nature over a relatively short period of time. | renewable resources |
| In a process called ____, the nucleus of a uranium atom is split into two smaller nuclei, releasing nuclear energy. | nuclear fission |
| ____ are energy resources that formed from the buried remains of plants and animals that lived millions of years ago. | fossil fuels |
| Some energy resources, called ____, either cannot be replaced after they are used or can be replaced only over thousands or millions of years. | nonrenewable resources |
| If it were possible, a ____ would be a machine that runs forever without any additional energy. | perputal motion machine |
| The ____ states that energy can neither be created nor destroyed. | law of conservation of energy |
| ____ is a force that opposes the motion between two surfaces that are touching. | Friction |
| An ____ is a change from on form of energy into another. | energy conversion |
| ____ energy is the energy an object has because of its position or shape. | potential |
| The thermal energy of a substance changes eith the ____ of its particles. | kinetic energy |
| ____ is the ability to do work. | energy |
| Name three renewable resources | water ; wind ; biomass |
| Name three nonrenewable resources | coal ; petroleum ; natural gas |
| Explain energy conversion | Energy conversion is getting the energy you already have and change it into a form you need. You can use machines to help you convert the energy. Although some energy during the conversion will always be lost th thermal energy. |
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