Energy

Question 1

What is energy?

Answer 1

Energy is the ability to do work

Question 2

What is the source of energy on earth

Answer 2

The sun

Question 3

What type of energy does the sun provide

Answer 3

Heat energy

Light energy

Question 4

What is the process whereby plants make food from the sun?

Answer 4

Photosynthesis

Question 5

What is a food chain

Answer 5

A food chain is how energy moves through all living habitats and ecosystems

The chain begins with the sun and ends with animals

Question 6

What are the 2 groups of energy sources

Answer 6

Renewable and non renewable

Question 7

What are renewable energy sources

Answer 7

Sources of energy that are unlimited or can be replaced

If it can be recreated in about 100 years

Examples wind, solar, water

Also called clean or green energy because it doesn’t pollute

Question 8

What are non renewable sources of energy?

Answer 8

Can’t be replaced in a relatively short time. Most of our energy comes form fossil fuels (natural gas, crude oil)

Question 9

Give examples of renewable energy

Answer 9

Wind
Wind farms …The wind spins the turbines to create electricity

Water
Can be used to generate electricity …this is called hydropower

Solar
Converts sunlight into electricity

Question 10

Give examples of non renewable energy sources

Answer 10

Oil
Pumped out of the ground. Used in vehicles or for heating

Gas
Extracted from the ground…Used for cooking and heating or converted to electricity

Coal and uranium
Both are mined from the earth. Coal is burned to generate electricity
Uraniumis used to power nuclear generators

Question 11

What are the 2 types of energy?

Answer 11

Kinetic and potential

Question 12

What is kinetic energy?

Answer 12

The energy of motion…ie whenever you are moving

Question 13

What is potential energy

Answer 13

Energy that is stored…example is a battery

Question 14

What types of energy are there?

Answer 14

Mechanical
Electrical
Light
Thermal
Sound
Chemical

Question 15

What is mechanical energy

Answer 15

Moving energy…example is a car or bike

Question 16

Electrical energy

Answer 16

Caused by movement of electrons. Electric energy is in batteries and outlets in our homes. Examples would be TVs and video games

Question 17

What is light energy

Answer 17

The only form of energy we can see. It is formed via chemical, radiation or mechanical means. Light energy can also be covered into other forms of energy. Examples are visible light, xrays and radio waves

Question 18

What is thermal energy?

Answer 18

Energy that comes from heat…examples are cooking on a stove

Question 19

What is sound energy

Answer 19

Sound energy is produced when an object is made to vibrate. Sound energy travels in all directions. Sound need to travel through a medium like air or water. Examples would be guitar etc

Question 20

What is chemical energy

Answer 20

Stored energy. Once chemical energy is released from a substance that substance is transformed into an entirely different substance. Examples are batteries, coal etc

Question 21

What is an energy transformation

Answer 21

The change of energy from one form to another

Question 22

Can energy be created

Answer 22

No, energy can neither be created nor destroyed, but it can change from one form to another

Question 23

Give examples of energy transformations

Answer 23

A toaster transforms electrical energy into thermal energy

A blender converts electrical energy into mechanical energy

Question 24

What is input energy

Answer 24

An appliance needs energy to go into to it to make it work …this is called input energy. Examples…A TV needs electrical energy as an input

Question 25

What is output energy

Answer 25

The energy that an appliance creates for us to use…I.e. A toaster out put energy is thermal energy