Energy

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1

Energy

The ability to do work or cause change

2

Power

The rate at which work is done

3

How are power and energy related?

Power is the rate at which energy is transferred

4

How are work and energy related?

Work is the transfer of energy.

5

What are the two main types of energy?

Kinetic and Potential

6

Kinetic Energy

The energy an object has due to its motion.

7

What two factors affect Kinetic energy?

mass and speed

8

Potential Energy

energy that results from the position or shape on an object

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What type of potential energy is related to an object's height?

Gravitational energy

10

How do you find the gravitational potential energy?

weight x height

11

Elastic potential energy has to do with what?

shape

12

Mechanical Energy associates with what?

an object's motion, position or shape

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How do you calculate mechanical energy?

Add together the object's kinetic and potential energy

14

An object with mechanical energy can do __________ on another object

work

15

Other forms of energy dealing with the object's particles are

nuclear energy, thermal energy, electrical energy, electromagnetic energy, and chemical energy

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Nuclear Energy is stored in an

atom's nucleus

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Nuclear energy energy happens during two types of nuclear reactions. What are they?

Nuclear fission and nuclear fusion

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Nuclear fusion happens when

atoms join together - occur constantly in the sun

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nuclear fission happens when

the nucleus splits in half - nuclear fission in a power plant creates electricity

20

What type of energy has particles constantly in motion? The total kinetic and potential energy of the particles are this type of energy. It creates heat.

thermal energy

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The higher the temperature the ________________ thermal energy it has.

the more thermal energy it has

22

Electrical energy is

the energy of electrical charges. - getting shocked when touching a door knob - lightening - batteries - electrical lines

23

electromagnetic energy (also radiant energy) is a form of energy that travels through space in ___________________

waves (vibrating electric charges) - UV rays from the sun, x-rays, microwaves, infrared (heat) waves and radio waves. Cell phones send and receive messages using microwaves

24

Chemical energy is in ______________, _______________ and ___________.

food, matches, and body cells

25

All forms of energy can be ________________________ into other forms of energy. A change from one form of energy to another is call an ___________________ _________________.

transformed

energy transformation

26

There are two types of transformations, single and multiple. Give an example of each.

single - toaster transforms electrical energy to thermal energy to toast your bread. cell phone transforms electrical energy to electromagnetic energy that travels to other phones or your body transforms chemical energy in food to the mechanical energy you need to move your muscles

multiple - book pg 53

27

Law of conservation of energy states

when one form of energy is transformed to another, no energy is lost in the process.

Energy cannot be created near destroyed