s

Question 1

boiling point

Answer 1

temperature at which a substance changes from liquid state to gas state

Question 2

condensation

Answer 2

change of state from gas to liquid by removing heat energy

Question 3

conduction

Answer 3

flow of energy between substances that are in contact

Question 4

conductor

Answer 4

material that allows heat energy or electricity to flow easily

Question 5

convection

Answer 5

flow of heat energy that involves moving liquid or gas particles

Question 6

freezing point

Answer 6

temperature at which a substance changes from liquid state to solid state

Question 7

heat energy

Answer 7

energy that flows from matter at a higher temperature to matter at a lower temperature

Question 8

insulator

Answer 8

material that does not allow heat energy or electricity to flow easily

Question 9

kinetic energy

Answer 9

energy of movement ; particles that make up matter have kinetic energy

Question 10

melting point

Answer 10

temperature at which a substance changes from a solid to a liquid state

Question 11

particle theory of matter

Answer 11

model that explains the behaviour of solids, liquids and gases

Question 12

radiation

Answer 12

flow of energy in the form of invisible waves

Question 13

temperature

Answer 13

a measurement of the average kinetic energy of the particles in a substance

Question 14

what is the difference between temperature, heat and thermal energy

Answer 14

temputure is the average kinetic energy, thermal energy is the total kinetic energy and heat is the energy that flows from matter at a higher temp to a lower temp

Question 15

4 main points of the particle model of matter

Answer 15

all matter is made up of tiny particles
the particles are always moving
adding heat makes the particles move faster
the particles have space between them

Question 16

thermal expansion

Answer 16

expansion of a substance caused by an increase in thermal energy

Question 17

thermal energy

Answer 17

the total kinetic energy of the particles

Question 18

solid

Answer 18

a state of matter, is a fixed volume, attached to each other in all directions

Question 19

gas

Answer 19

a state of matter, the particles are not connected to one another

Question 20

liquid

Answer 20

a state of matter, are loosely attached to each other

Question 21

describe the volume, shape, kinetic energy and space of a solid

Answer 21

space between - no space, held together
volume and shape - holds shape, fixed volume
movement (kinetic energy) - vibrates or shake back and forth in a fixed position

Question 22

describe the volume, shape, kinetic energy and space of a liquid

Answer 22

space - close together
volume and shape - fixed volume, shape of container
movement (kinetic energy) - can slip past each other, particles are weak

Question 23

describe the volume, shape, kinetic energy and space of a gas

Answer 23

space - not together at all
volume and shape- volume and shape of container
particle movement - all directions

Question 24

what is conduction, radiation and convection?

Answer 24

conduction- flow of energy between substances that are in contact
convection - flow of heat energy that involves moving liquid or gas particles
radiation - flow of energy in the form of invisible waves