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Physics- Year 9 > Unti 2- Heat Transfer > Flashcards

Unti 2- Heat Transfer Flashcards

1
Q

What is a thermal insulator

A

Is a material that does not transfer heat energy easily

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2
Q

What is convection

A

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

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3
Q

What is conduction

A

Is the transfer of heat energy through a material

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4
Q

What is radiation

A

Is energy that is carried mainly by infrared radiation

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5
Q

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

A

It becomes less dense and heats up

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6
Q

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

A

It becomes more dense and cools

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7
Q

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

A

Good: shiny white
Bad: matte black

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8
Q

What are shiny/ light coloured objects good at

A

They are good reflectors of heat

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9
Q

What are black objects good at

A

They are good absorbers and emitters of heat

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10
Q

What are the 4 best conductors?

A
  1. Aluminium
  2. Copper
  3. Brass
  4. Steel
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11
Q

What does conduction cause

A

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

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12
Q

What are only metal

A

Metals are only conductors and they only contain electrons

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13
Q

What is a thermal conductor

A

Is a material that transfers heat energy easily

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14
Q

Name four non-renewable source

A
  1. Coal
  2. Oil
  3. Natural Gas
  4. Nuclear
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15
Q

Name seven renewable resources

A
  1. Geothermal power
  2. Wind power
  3. Solar power
  4. Tidal power
  5. Wave power
  6. Biomass
  7. Hydroelectric power
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16
Q

Name coal power station energy transfers

A

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)

17
Q

Name the advantages of coal power

A
  1. It is an easily way to create electricity
  2. It is effective
  3. It is reliable
18
Q

Name the disadvantage of coal power

A
  1. The burning cause pollution
  2. It is non renewable, there is limited supples
  3. You have to transport and store the fuel
19
Q

Name a solar cell energy transfers

A

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

20
Q

Name the advantages of solar cells

A

They are portable

21
Q

Name the disadvantage of solar cells

A
  1. Weather dependent

2. The are expensive to enstoll

22
Q

Name the energy transfers of wind power

A

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

23
Q

Name the advantages of wind power

A
  1. The tecnogy is well developed

2. You find them off shore

24
Q

Name the disadvantage of wind power

A
  1. They are ugly

2. Weather dependent

25
Q

Name the energy transfers for hydroelectric power

A

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

26
Q

Name the advantages of hydroelectric power

A
  1. No pollution

2. You can turn it on and off

27
Q

Name the disadvantage of hydroelectric power

A

It can cause flooding

28
Q

Name the energy transfers of geothermal power

A

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)

29
Q

Name the advantages of geothermal power

A
  1. No pollution

2. It is reliable

30
Q

Name the disadvantage of geothermal power

A
  1. You can’t do it everywhere

2. It is quite expensive

31
Q

Name the energy transfers of tidal power

A

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

32
Q

Name the advantages of tidal power

A
  1. No pollution

2. Tides are reliable

33
Q

Name the disadvantages of tidal power

A
  1. I can damage sea life
34
Q

Name the energy transfers of wave power

A

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

35
Q

What are the advantages of wave power

A
  1. No pollution
36
Q

Name the disadvantages of wave power

A
  1. Salt water is corrosive
37
Q

Name the energy transfers of biomass

A

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)

38
Q

What are the advantages of biomass

A
  1. Replace it quickly
39
Q

What are the disadvantages of biomass

A
  1. Creates carbon dioxide

2. Land could be used to grow crops

Physics- Year 9 (5 decks)

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