Forms of Energy Add these notes to your flip folder. Refer to Coach book pages 112-113, textbook section 9-1, and Worksheet 18.

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Forms of Energy Add these notes to your flip folder. Refer to Coach book pages , textbook section 9-1, and Worksheet 18

a. Explain energy transformation in terms of the Law of Conservation of Energy. S8P2. Students will be familiar with the forms and transformations of energy.

The law of conservation of energy states that: Energy is never destroyed Energy is never created Energy may be transformed or converted from one form to another Energy is constantly changing forms

b. Explain the relationship between potential and kinetic energy. Kinetic Energy Energy of Motion Depends on Speed Mass More speed = more KE More mass = more KE

Potential Energy—Stored energy Energy of position, shape, or condition More weight = more PE More height = more PE

Kinetic energy Potential energy

Kinetic energy Potential energy

Kinetic energy Potential energy

Kinetic energyPotential energy

c. Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and their characteristics. Forms of Energy include:

Mechanical Motion Energy-- energy caused by objects that are moving

Electrical energy—energy of moving electrons

Thermal energy (heat)—the total motion of the atoms and molecules within a substance ex. Atoms move faster in hot water than ice water

Light (radiant energy)—electromagnetic energy that travels in waves and can travel through empty space (a vacuum) ex. Sunlight, X-rays, microwaves, see p.636

Stored (potential) energy Found in objects that want to bounce back into their natural shape when they are stretched, squished, or turned

Chemical energy —energy stored in the bonds of atoms and molecules (released during chemical changes)

Nuclear energy—energy which holds together the nucleus of an atom. Released when atoms are split apart (fission) or joined together (fusion) ex. nuclear power plants

Gravitational potential energy—energy stored because of where it is placed (higher = more PE) (Depends on weight and height)

Sound energy—energy of vibrations carried through solids, liquids, or gases (It travels in waves but cannot move through empty space.)

Now you’ve got them all. Study them tonight!

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