Physics

Question 1

What is renewable energy?

Answer 1

Energy that can be produced again and again.

Question 2

What is non-renewable energy?

Answer 2

Energy that can’t be produced again and again.

Question 3

Give examples of renewable energy.

Answer 3

Windmill, Solar, Hydroelectric, Tidal energy.

Question 4

What type of energy resources are Fossil fuels?

Answer 4

Non-renewable.

Question 5

Give an advantage of a Fossil fuel.

Answer 5

Heating, Transport.

Question 6

Give an Disadvantage of an fossil fuel.

Answer 6

Limited Supply, takes millions of years to make.

Question 7

What type of energy resource is solar power?

Answer 7

Renewable.

Question 8

Give an advantage of solar power.

Answer 8

No carbon dioxide is released, No fuel is needed.

Question 9

Give an disadvantage of solar power.

Answer 9

Not reliable in a country where it doesn’t rain so often.

Question 10

What type of energy resource is wind energy?

Answer 10

Renewable.

Question 11

Give an advantage of wind energy.

Answer 11

No electricity is needed.
More wind = More energy.
No fuel needed.

Question 12

Give an disadvantage of wind power.

Answer 12

If there is no wind, the electricity power towers do not generate any electricity. Expensive.

Question 13

What type of resource is hydroelectric energy?

Answer 13

Renewable.

Question 14

Give an advantage of hydroelectric energy.

Answer 14

No carbon dioxide released. No fuel needed.

Question 15

Give disadvantages of hydroelectric energy.

Answer 15

Not reliable if in a country where doesn’t not rain much.

Question 16

What type of source is geothermal energy?

Answer 16

Renewable

Question 17

Give an advantage of Geothermal energy.

Answer 17

Conducts heat.

Environmentally friendly.

Question 18

Give an disadvantage of Geothermal Energy.

Answer 18

Geothermal energy using wells requires an incredible usage of water.

Question 19

What type of energy resource is Nuclear energy?

Answer 19

Non- Renewable.

Question 20

Give advantage of Nuclear energy.

Answer 20

It produces a lot of energy
= 300 000 MJ
Greenhouse gas.

Question 21

Give disadvantage of Nuclear energy.

Answer 21

If there’s an accident then it can cause diseases such as cancer. (radioactive)

Question 22

What type of source is bio-fuel?

Answer 22

Renewable.

Question 23

Give advantages of bio-fuel.

Answer 23

High conductivity.

Question 24

Give disadvantages of bio-fuels.

Answer 24

does not hold as much power when compared to regular diesel or gasoline based fuels

Question 25

What type of source is tidal energy?

Answer 25

Renewable.

Question 26

Give advantages of tidal energy.

Answer 26

No carbon-dioxide is released. | No fuel needed.

Question 27

Give disadvantages of tidal energy.

Answer 27

Loads of cables needed. Can ruin coastlines. Expensive

Question 28

What is a series circuit?

Answer 28

The components are connected end-to-end, one after the another. They make a simple circuit for current to flow around. If one bulb is removed the whole circuit is broken and all the bulbs go out.

Question 29

What is a parallel circuit?

Answer 29

The components are connected side-by-side. the current has a choice of paths/routes. If one bulb blows there would still be a circuit to the other bulb so it stays lit.

Question 30

Define electricity.

Answer 30

Electricity is the flow of electrons.

Question 31

A circuit must be...

Answer 31

complete for electricity to flow through.

Question 32

What do electrical insulators do?

Answer 32

They prevent the flow of electricity.

Question 33

Explain Series circuit further.

Answer 33

Current is the same at any point. | The voltage is also the same.

Question 34

Explain parallel circuit further.

Answer 34

The circuit splits equally into the number of branches you have. The voltage is the SAME!

Question 35

What is current measured in?

Answer 35

Amps (Ammeter)

Question 36

What is voltage measured in?

Answer 36

Volts.

Question 37

What is the resistance measured in?

Answer 37

Ohms.

Question 38

Describe state of gases.

Answer 38

``` Particles are spread out. Random arrangement. Low density. Particles are free to move around. They have a lot of kinetic energy. ```

Question 39

Describe the state of liquid.

Answer 39

Particles are randomly arranged. Not in a fixed position. Particles can move medium density. Not so much kinetic energy.

Question 40

Describe the state of a solid.

Answer 40

Fixed shape/position. They cannot move but can vibrate in a fixed position. High density. No kinetic energy.

Question 41

What is density?

Answer 41

The mass per unit volume.

Question 42

What is specific latent heat?

Answer 42

The amount of energy required to change 1 kg of a substance.

Question 43

What is independent variable?

Answer 43

something that you can change.

Question 44

What is dependent variable?

Answer 44

something you measure.

Question 45

What is control variable?

Answer 45

something that you keep the same.

Question 46

What is latent heat of fusion?

Answer 46

the amount of energy needed to change a substance from a liquid to solid.

Question 47

What is latent heat of vaporization?

Answer 47

the amount of energy needed to change a substance from gas to liquid.

Question 48

What is specific latent heat?

Answer 48

the energy needed to change a substance from a solid to a liquid.