Study Guide Energy
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Last updated 11:36 PM on 11/14/22
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42 Terms
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What are the 7 forms of energy?
Mechanical, radiant, chemical, electrical, nuclear, thermal, sound.
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What is the law of conservation of energy?
Energy cannot be created or destroyed. Energy can be transformed into other forms of energy.
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What is energy transformation?
The change of energy from one form to another. All forms of energy and energy transformations can be traced back to the energy from the Sun.
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What two categories of energy do the 7 forms of energy fall into?
Kinetic energy, the energy of moving objects and potential energy ,energy that is stored.
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What is kinetic energy?
Energy which a body possesses by virtue of being in motion.
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What factors determine something’s kinetic energy?
Mass and speed.
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What is the formula for kinetic energy?
K.E. = 1/2 m v2. Units of kilograms-meters squared per second squared.
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What are 2 examples of KE?
A person walking and a thrown baseball.
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What is potential energy?
Stored energy that is related to height.
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What factors determine something’s potential energy?
Mass, gravity, and height.
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What is the formula for potential energy?
PE= mgh
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What are 2 examples of PE?
A rock sitting on the edge of a cliff. A raised hammer has PE due to gravity.
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What is the unit for energy?
Joules (J)
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Where is the place where the cars on the roller coaster would have the most potential energy?
B
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Where would the cars have the most kinetic energy?
D
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Where would the cars have the least kinetic energy?
A
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Where would the energy be changing from potential to kinetic?
C
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Water flowing from a waterfall before it hits the pond below.
K and P
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Mechanical Energy
The energy in moving objects.
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Mechanical Energy example
Spinning Gears, Windmill, Riding a bicycle.
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Thermal energy
The energy of heat.
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Thermal energy example
Iron, Toaster, Fire.
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Radiant energy
Energy of light ; also referred to as light energy or electromagnetic energy.
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Radiant energy example
Television, Traffic lights, Cell phones.
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Electrical energy
The energy of moving electrons or electric charges.
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Electrical energy example
Lamp, Electrical Outlet, Charger.
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Chemical energy
Energy stored in the bonds of molecules.
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Chemical energy example
Food, Coal, Battery.
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Nuclear energy
The energy locked in the nucleus of an atom.
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Nuclear energy example
Sun ( Stars), Power Plant, Atomic Bomb.
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Sound energy
The energy from vibrations in matter. A matter traveling through something.
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Sound energy example
Bullhorn, Alarm Clock, Radio.
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Nuclear Fission
The process of splitting an atom.
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Nuclear Fusion
Two or more atoms violently joined together to make a larger atom.
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Hair Dryer
Electrical, Thermal, Mechanical and Sound
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Campfire
Chemical, Thermal and Radiant.
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Guitar
Mechanical, Sound.
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Solar Panels
Radiant, Electrical.
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Gravitational Potential
An object gains more potential energy as its height or mass increases
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Elastic Potential
Energy stored in bending , twisting , or stretching of an object
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An object gains more kinetic energy as its
speed or mass increases
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Greater speed and Greater mass
Greater kinetic
