States of matter

Question 1

define matter

Answer 1

anything that occupies space and has a mass

Question 2

state particle theory

Answer 2

all substances are made from tiny particles called atoms

Question 3

distinguish between the 3 main types of matter in terms of particle arrangement give examples of each

Answer 3

Solids:
*Closely packed together
*Fixed volume
*No fixed shape
*Cannot be squashed
Liquids:
*Packed close together, but still have a little space to move
*No fixed shape
*Fixed volume
*Cannot be squashed
Gas:
*Relatively far away from eachother
*No fixed shape
*No fixed volume
*Large spaces in between particles make it easy to squash

Question 4

what is physical change

Answer 4

A physcial change has no new product and so, it is easier to reverse it

Question 5

what are the 6 transitional reactions between matter

Answer 5

Melting = when a solid changes into liquid
Boiling = when a liquid changes into a gas
Evaporation = when a liquid changes into a gas
Condensation = when gas turns into liquid
Freezing = when a liquid changes into a solid
Sublimation = when a solid changes to a gas

Question 6

define boiling and melting point

Answer 6

*boiling point is the temperature that anobject is before it evaporates
*melting point is the point at which materials changes from a solid to a liquid

Question 7

what type of energy has to be present for a change in state to occur

Answer 7

thermal energy

Question 8

define diffusion

Answer 8

*diffusion is the random movement of particles in liquids and gases from an area of high concentration to an area of low concentration

Question 9

describe gas pressure in terms of volume and temperature

Answer 9

*The pressure of a gas is a factor of its volume and its temperature.
*The more volume a gas had, the higher the pressure.
*The higher the temperature a gas is, the higher the pressure.