Energy Review

Question 1

What is energy?

Answer 1

The ability to do work; to cause change

Question 2

What does the Law of Conservation of Energy say?

Answer 2

Energy is neither created nor destroyed, it only changes forms

Question 3

The largest source of energy for all the earth is the

Answer 3

sun

Question 4

What is thermal energy? Give two examples

Answer 4

Energy of heat caused by moving/vibrating particles. EX1: the sun; EX2: boiling water

Question 5

What is chemical energy? Give two examples

Answer 5

Energy stored in bonds in atoms and molecules. EX1: burning coal; EX2: gas

Question 6

What is nuclear/atomic energy? Give two examples

Answer 6

Energy stored in the nucleus of atoms. EX1: the sun; EX2: nuclear power plant

Question 7

What is radiant energy? Give two examples

Answer 7

Also known as light energy, the energy of electromagnetic waves. EX1: light bulb; EX2: the sun

Question 8

What is mechanical energy? Give two examples

Answer 8

Energy of moving parts. EX1: people; EX2: moving car/bicycle

Question 9

What is electrical energy? Give two examples

Answer 9

Energy of tiny moving particles called electrons. EX1: TV; EX2: toaster

Question 10

What energy transformation must occur to make cars move up a hill?

Answer 10

chemical -> mechanical

Question 11

When a light bulb is turned on, what type of energy transformations occur?

Answer 11

radiant, electrical, thermal

Question 12

Windmills turn _____ energy into _____ energy.

Answer 12

mechanical; electrical

Question 13

What causes macaroni noodles to rise and fall in a pot of boiling water?

Answer 13

convection

Question 14

When you walk on the hot summer beach sand, you are feeling what kind of energy?

Answer 14

thermal/conductive

Question 15

A pan on the stove is an example of what type of thermal energy?

Answer 15

conduction

Question 16

A person lying on the beach is getting hot because of what?

Answer 16

radiation

Question 17

When you eat lunch, you are changing the _____ energy stored in food into _____ energy when you chew.

Answer 17

chemical; mechanical

Question 18

What type of heat transfer brings thermal energy to earth?

Answer 18

radiation

Question 19

Explain why a metal spoon in a cup of hot water gets warmer.

Answer 19

Because of heat transfer through conduction

Question 20

Explain how the oven, stove, and microwave are examples of conduction, convection, and radiation.

Answer 20

oven -> convection; stove -> conduction; microwave -> radiation

Question 21

What is potential energy? Give one example

Answer 21

Energy stored in objects due to their position or chemical make-up. EX1: car on top of a hill

Question 22

What is kinetic energy? Give one example

Answer 22

Energy of motion. EX1: a moving car

Question 23

graph

Answer 23

-

Question 24

graph

Answer 24

-

Question 25

How does a coal burning power plant work?

Answer 25

chemical; thermal; mechanical; electrical

Question 26

How do toasters transform energy?

Answer 26

From electrical to thermal

Question 27

Know how to classify five forms of energy into potential or kinetic.

Answer 27

Potential: chemical, nuclear
Kinetic: electrical, mechanical, thermal

Question 28

A compressed spring has _____ energy

Answer 28

Potential

Question 29

A hair dryer turns _____ energy into _____ energy

Answer 29

electrical; thermal

Question 30

How does thermal energy behave/move?

Answer 30

Warmer into cooler