1. ENERGY
Chapter 5 Test Review
Tolle
Tuesday, November 20, 2018

2. Work is… the transfer of energy
any time you exert force on an object that causes it to move
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3. Energy is… the ability to do work or cause change
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4. Potential energy is… the type of energy has the potential to do work.
Associated with position and shape of an object
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5. Power is… The rate at which work is done. Power = Energy Transferred
Time
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6. Kinetic energy is… the energy an object has due to its motion.
KE = ½ x Mass x (Speed)2
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7. Elastic potential energy is…
Potential energy specific to the object’s shape
Associated with objects that can be stretched or compressed
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8. Mechanical energy is…
The form of energy associated with motion, position, or shape of an object.
Mechanical energy is always the same, the potential and kinetic energy changes though.
ME = Potential + Kinetic
Mechanical energy of the basketball is always 20 joules. However at Point C the kinetic energy is 0 and the potential is 20. As the ball falls it changes. At Point E there is much more kinetic energy and a lot less potential but the mechanical still equals 20 joules.
Tuesday, November 20, 2018

9. Gravitational potential energy is…
potential energy related to an object’s height or position from the ground
GPE = Weight x Height
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10. Sound energy is… Nuclear energy is… Chemical energy is…
a disturbance that travels through a medium as a wave.
Nuclear energy is…
a type of potential energy that is stored in the nucleus of an atom. Nuclear energy is released during a nuclear reaction. Fission splits nuclei and happens in a power plant. Fusion joins nuclei and happens in the sun.
Chemical energy is…
a potential energy stored in chemical bonds.
Thermal energy is…
the total kinetic and potential energy of the particles in an object. The parts of objects, like mocules or atoms, have a kinetic energy of motion, and a potential energy, based on how they are arranged. When these change, it changed the thermal energy which changes the temperature.

11. Electromagnetic energy is…
Electrical energy is…
The energy of electric charges. This can be a form of potential or kinetic depending on if the electrical current is being used or allowed to flow from one area to another. If your light is on, it’s kinetic. If your light is off, it’s potential.
Electromagnetic energy is…
a form of energy that travels through space in waves. The visible light we see is one type of electromagnetic energy. Others include radio waves and x-rays.

12. Energy transformations are…
A change or changes from one type of energy to another.
Single Ex: Chemical to Kinetic  I eat an apple then my muscles move from the energy.
Multiple Ex: Electromagnetic to Chemical to Kinetic  The sun’s light helps the apple tree grow an apple. Then I eat the apple and my muscles move from the energy.
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13. As an object falls its kinetic energy…
Increases
Decreases
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14. Law of conservation of energy states…
That when one form of energy is transformed to another, no energy is lost in the process.
Tuesday, November 20, 2018

15. Key Questions How are energy, work, and power related?
What are the two main types of energy?
How can you find an object’s mechanical energy?
What are other forms of energy?
How are different forms of energy related?
What is the Law of Conservation of Energy?
You should be able to answer these fully. Have a parent or friend use your book to check your answers.
Tuesday, November 20, 2018