Physical science chapter 15 study guide
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What is energy a transfer of?
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Work
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What is kinetic energy?
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Energy of motion
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How do you calculate kinetic energy?
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1/2mu2
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What is elastic potential energy, and would be an example of it?
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Wind up toy
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Why would the gravitational potential energy of a 1 meter above the surface of the earth be less on the moon?
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Less acceleration due to gravity
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How is gravitational potential energy calculated?
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Mgh
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What happens to the level of thermal energy of an object as it is warmed up?
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Thermal energy increases
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Gasoline is an example of what type of energy?
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Chemical energy
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What is the definition of thermal energy?
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Kinetic energy
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Chemical energy is converted into what type of energy as a person is walking?
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Mechanical energy
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Solar cells convert what type of energy into electrical energy?
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Electro magnetic
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What three things are true about the law of conservation of energy?
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Cant be destroyed or created but can be changed
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What is biomass energy?
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Chemical energy stored in living things
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What are non-renewable energy sources and what are three examples?
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Gas oil coal
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Why are fossil fuels used so extensively worldwide?
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They are cheap and easy to find
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Why can we not rely solely on solar energy as our only energy source?
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Cant predict the weather
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What increases as work is done on an object?
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Energy
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What aspects of an object must double for the kinetic energy of that object to double?
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Double the mass
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What is the definition of potential energy?
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Stored in position shape
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What would be an example of elastic energy?
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Spring
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Does mechanical energy include kinetic or chemical energy?
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Kinetic energy
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Mechanical energy is the sum of what two kinds of energy?
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Kinetic & potential
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What happens in energy conversion?
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Energy changes its form
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What is the equation for the speed of light ?
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E=mc2
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What are energy sources that cannot be replenished in less than a few million years known as?
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Non-renewable
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Energy resources such as geothermal or hydroelectric are good sources of renewable energy in what what that is helpful to the planet earth?
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Doesnt polute
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How can we help with energy conservation in our daily lives?
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Turn off the lights
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In way can you increase the elastic potential energy of a spring?
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Stretch it
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What is the most familiar form of electromagnetic energy?
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Visible light
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What energy conversion takes place as an arrow is shot from a bow?
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Kinetic potential and mechanical
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What are two examples of non renewable energy resources?
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Oil natural gas
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What is a characteristic of a renewable energy source?
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Replaced in a short amount of time
