Unti 2- Heat Transfer

Question 1

What is a thermal insulator

Answer 1

Is a material that does not transfer heat energy easily

Question 2

What is convection

Answer 2

Is heat transfer in a liquid or gas-when particles in a warmer region gain energy and move into cooler region carrying this energy with them

Question 3

What is conduction

Answer 3

Is the transfer of heat energy through a material

Question 4

What is radiation

Answer 4

Is energy that is carried mainly by infrared radiation

Question 5

When the water rises in a convection current what happens to it?

Answer 5

It becomes less dense and heats up

Question 6

When the water sinks in a convection current what happens to it?

Answer 6

It becomes more dense and cools

Question 7

What is good at keeps heat in and what are bad?

Answer 7

Good: shiny white
Bad: matte black

Question 8

What are shiny/ light coloured objects good at

Answer 8

They are good reflectors of heat

Question 9

What are black objects good at

Answer 9

They are good absorbers and emitters of heat

Question 10

What are the 4 best conductors?

Answer 10

1. Aluminium
2. Copper
3. Brass
4. Steel

Question 11

What does conduction cause

Answer 11

It cause particles to vibrate more quickly and they need more space so the object expands

Question 12

What are only metal

Answer 12

Metals are only conductors and they only contain electrons

Question 13

What is a thermal conductor

Answer 13

Is a material that transfers heat energy easily

Question 14

Name four non-renewable source

Answer 14

1. Coal
2. Oil
3. Natural Gas
4. Nuclear

Question 15

Name seven renewable resources

Answer 15

1. Geothermal power
2. Wind power
3. Solar power
4. Tidal power
5. Wave power
6. Biomass
7. Hydroelectric power

Question 16

Name coal power station energy transfers

Answer 16

Chemical potential energy (stored in the fuel) ➡️ heat energy (in the water) ➡️ kinetic energy (in the water) ➡️ kinetic energy (in the turbines and generator) ➡️ electrical energy (in the cables)

Question 17

Name the advantages of coal power

Answer 17

1. It is an easily way to create electricity
2. It is effective
3. It is reliable

Question 18

Name the disadvantage of coal power

Answer 18

1. The burning cause pollution
2. It is non renewable, there is limited supples
3. You have to transport and store the fuel

Question 19

Name a solar cell energy transfers

Answer 19

Light energy (from the sun) ➡️ electrical energy (in the cables)

Question 20

Name the advantages of solar cells

Answer 20

They are portable

Question 21

Name the disadvantage of solar cells

Answer 21

1. Weather dependent

2. The are expensive to enstoll

Question 22

Name the energy transfers of wind power

Answer 22

Kinetic energy (in the wind)➡️ kinetic energy (in the turbines and the generators) ➡️ electrical energy (in the cables)

Question 23

Name the advantages of wind power

Answer 23

1. The tecnogy is well developed

2. You find them off shore

Question 24

Name the disadvantage of wind power

Answer 24

1. They are ugly

2. Weather dependent

Question 25

Name the energy transfers for hydroelectric power

Answer 25

GPE (stored in the water)➡️ kinetic energy (in the water) ➡️ kinetic energy (in the turbines and the generator) ➡️ electrical energy (in the cables

Question 26

Name the advantages of hydroelectric power

Answer 26

1. No pollution | 2. You can turn it on and off

Question 27

Name the disadvantage of hydroelectric power

Answer 27

It can cause flooding

Question 28

Name the energy transfers of geothermal power

Answer 28

Heat/ thermal energy (in the ground)➡️ heat energy (in the water) ➡️ kinetic energy (in the water) ➡️ kinetic energy (in the turbines and the generator) ➡️ electrical energy (in the cables)

Question 29

Name the advantages of geothermal power

Answer 29

1. No pollution | 2. It is reliable

Question 30

Name the disadvantage of geothermal power

Answer 30

1. You can't do it everywhere | 2. It is quite expensive

Question 31

Name the energy transfers of tidal power

Answer 31

GPE (in the water) ➡️ Kinetic energy (in the water)➡️ Kinetic energy (in the turbines and the generators) ➡️ electrical energy (in the cables)

Question 32

Name the advantages of tidal power

Answer 32

1. No pollution | 2. Tides are reliable

Question 33

Name the disadvantages of tidal power

Answer 33

1. I can damage sea life

Question 34

Name the energy transfers of wave power

Answer 34

Kinetic energy (in the water)➡️ kinetic energy (in the turbines and generators) ➡️ electrical energy (in the cables)

Question 35

What are the advantages of wave power

Answer 35

1. No pollution

Question 36

Name the disadvantages of wave power

Answer 36

1. Salt water is corrosive

Question 37

Name the energy transfers of biomass

Answer 37

Chemical energy (stored in biomass) ➡️ heat energy (in the water)➡️ kinetic energy (in the water) ➡️ kinetic energy (in the turbines and the generator) ➡️ electrical energy (in the cables)

Question 38

What are the advantages of biomass

Answer 38

1. Replace it quickly

Question 39

What are the disadvantages of biomass

Answer 39

1. Creates carbon dioxide | 2. Land could be used to grow crops