heat transfer

Question 1

absorb

Answer 1

to take in energy

Question 2

condense

Answer 2

when gas turns to liquid

Question 3

conduction

Answer 3

the way heat travels through solids. the energy will make the particles vibrate and hit eachother, creating a knock on effect and the energy will travel up the solid. metals have free electrons which can move around and aren’t fixed like the other particles. These free electrons transfer energy faster as they can move between the fixed particles quickly.

Question 4

contract

Answer 4

get smaller

Question 5

emit

Answer 5

to give out energy

Question 6

convection current

Answer 6

a current created by heat causing changes in the density of a fluid. as the substance looses density it will expand and become liter than the surroundings and rise, as it rises away from the heat source it will cool and come back down, this will then push more fluid towards the heat and so on.

Question 7

evaporate

Answer 7

liquid turns to a gas.

Question 8

gas

Answer 8

particles that are spread out and not connected

Question 9

heat insulator

Answer 9

materiel that doesn’t let heat energy travel through it easily.

Question 10

infrared radiation

Answer 10

a wave that can travel through transparent things and vacuums.

Question 11

insulator

Answer 11

a materiel that doesn’t let energy flow them easily.

Question 12

joules

Answer 12

the units for measuring energy.

Question 13

melt

Answer 13

when a solid turns to a liquid.

Question 14

radiation

Answer 14

the transfer of energy through waves.

Question 15

solid

Answer 15

made of particles that are fixed to and vibrate around eachother.

Question 16

liquid

Answer 16

something made of particles that are touching in an irregular array and can move past eachother.

Question 17

thermal energy

Answer 17

heat energy

Question 18

heat transfer

Answer 18

cold doesn’t exist it is a lack of heat and heat will flow from warmer objects to colder objects- the closer they get to eachother in temperature, the slower the flow. e.e. when you are in room below your body temperature, heat will flow from you into the room.

Question 19

boiling and freezing points

Answer 19

boiling and freezing points differ depending on the pressure and altitude.

Question 20

heating molecules

Answer 20

the less molecules there are to heat, the hotter the substance becomes.