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