thermal energy and sustainability

Question 1

chemical energy

Answer 1

the kind of energy stored in chemicals. food, fuel and batteries

Question 2

kinetic energy

Answer 2

anything moving has kinetic energy

Question 3

sound energy

Answer 3

energy released by vibrating objects

Question 4

electrical energy

Answer 4

energy in moving charges, can be made to flow through wires

Question 5

potential energy

Answer 5

stored energy in raised objects (anything up high) or stored energy in stretched or squashed objects

Question 6

light energy

Answer 6

energy given out or radiated by objects

Question 7

thermal energy

Answer 7

also known as heat energy

Question 8

nuclear energy

Answer 8

energy stored in nuclei of atoms

Question 9

fossil fuel

Answer 9

coal oil and gas-all fuels formed from remains of dead plant material or marine life that have been fossilised

Question 10

renewable

Answer 10

an energy source that will never run out (e.g wind, wave, solar, hydro and geothermal)

Question 11

global warming

Answer 11

the earth is getting hot because of humans burning fossil fuels releasing carbon dioxide and other greenhouse gases into the air

Question 12

non renewable

Answer 12

any source of energy that will run out(e.g coal oil gas and nuclear)

Question 13

conduction of heat

Answer 13

the transfer of heat energy from one part of a substance to another

Question 14

convection of heat

Answer 14

a flow of liquid or gas caused by heating or cooking

Question 15

radiation of heat

Answer 15

all hot objects give out heat energy as invisible waves called infra-red radiation

Question 16

sustainable

Answer 16

a way of living that does not use non-renewable resources or harm the environment

Question 17

difference between heat and temperature

Answer 17

heat is a energy and temperature is to measure hot to cold

Question 18

good conductors of heat

Answer 18

metal

Question 19

good insulators of heat

Answer 19

Wool
Fiberglass
Rock wool
Polystyrene
Polyurethane
Cork
Glass wool

Question 20

what is energy

Answer 20

the ability to do work

Question 21

where do humans get energy from

Answer 21

humans get energy from food

Question 22

name a type of energy

Answer 22

heat, nuclear, fossil fuel, light, electrical, kinetic, sound, potential and chemical

Question 23

can energy be created and destroyed

Answer 23

no

Question 24

conduction of heat in different metals

Answer 24

some metals like copper and aluminium conduct heat easily, so get hot quickly.
metals like steel and bronze conduct heat slowly so needs lots of energy to get hot

Question 25

steps involved in burning fossil fuels in a power station

Answer 25

step 1 burn the coal
step 2 heat up water in the boiler
step 3 water turns to steam
step 4 steam is sent to a turbine
step 5 steam moves turbine and creates electricity

Question 26

energy changes in a power station

Answer 26

Coal: chemical>heat>electrical
Hydro: potential>kinetic>electrical
Nuclear: heat>kinetic>electrical

Question 27

radiation falling on black and shiny surfaces

Answer 27

black surfaces absorb solar radiation, shiny surfaces reflect solar radiation

Question 28

energy generated by different sources

Answer 28

solar, geothermal energy, wind and hydro

Question 29

example of heat energy transfer by radiation

Answer 29

getting sunburned