Useful and Non-useful energy transfers and renewable energy and non-renewable energy

Question 1

What are useful energy sources?

Answer 1

the things that you need from an energy transfer

Question 2

What are non-useful energy transfers?

Answer 2

the things that you do not need

Question 3

Describe the process of energy transfers using a car’s engine.

Answer 3

The energy input is oil. The useful energy output is kinetic energy. The non-useful energy outputs are thermal energy and sound energy.

Question 4

Describe the process of energy transfer with a light bulb.

Answer 4

Electricity is input. Useful energy transfer is light and non-useful energy transfer is thermal energy.

Question 5

What change will come in the energy when the electrons have gone to the positive side of a circuit after going through bulbs and other components.

Answer 5

The energy would decrease.

Question 6

Natural resources

Answer 6

things that people use that come from nature

Question 7

examples of natural resources

Answer 7

Light, air, water, plants, animals, stone, soil, minerals and fossil fuels

Question 8

Non-renewable resources

Answer 8

things that can be used up. They have a fixed amount

Question 9

Renewable resources

Answer 9

things that are replenished by nature in a very short time. They rely on natural processes.

Question 10

Examples of non-renewable resources

Answer 10

Coal, oil, natural gas, nuclear energy, minerals. Even sunlight is a non-renewable source but there is so much of it that it can not be used.

Question 11

Examples of renewable resources

Answer 11

plants, animals, water, air.

Question 12

What must a source do to remain a renewable source?

Answer 12

They should not be used faster than nature can replace it.

Question 13

For each tree cut down…

Answer 13

one must be planted

Question 14

How does wind work?

Answer 14

hot air rises and cold air comes to replace it

Question 15

What is the water process?

Answer 15

water cycle

Question 16

Geothermal energy

Answer 16

Rainwater goes to the surface and then it travels down to magnetic heat source. Because the water is light because of the heat it travels up and humans use it. The steam can be used to spin turbines to generate electricity or heat can be extracted from the pipes for humans to use directly.

Question 17

What was coal first?

Answer 17

plant

Question 18

Why did coal change?

Answer 18

time+ pressure+ heat

Question 19

Alternative

Answer 19

Renewable

Question 20

How do we extract energy from the wind with turbines?

Answer 20

Turbines turn that energy into mechanical energy and mechanical energy will turn into electrical energy

Question 21

Solar energy

Answer 21

Solar energy= sun energy—> electrical energy

Question 22

Hydropower

Answer 22

water power. Energy captured from moving water. Hydrochloric acid.

Question 23

Falling water with the help of gravity turn the turbines …

Answer 23

creating electricity.

Question 24

Biomass/ Biofuel

Answer 24

fuel made from plants and animal waste. Energy is stored from the sun in the plant which can be turned in solids, liquids or gas that can provide energy from a human source.

Question 25

What is the disadvantage of fossil fuels?

Answer 25

creates pollution

Question 26

What is most of the energy we use?

Answer 26

non-renewable

Question 27

What are 2 advantages of renewable resources?

Answer 27

less pollution

gets replenished