Matter And Mixtures

Question 1

Matter

Answer 1

Anything that occupies space and has mass

Question 2

Mass

Answer 2

Is the amount of matter In an object

Question 3

3 states of matter

Answer 3

Solids
Liquids
Gases

Question 4

What makes them different

Answer 4

The way their molecules are arranged

Question 5

Properties of solids

Answer 5

Solids have a definite shape
Solids have a definite volume
Solids cannot be compressed
Solids cannot flow

Question 6

Properties of liquids

Answer 6

Liquids have no definite shape
Liquids have a definite volume
Liquids cannot be compressed
Liquids can flow

Question 7

Properties of gases

Answer 7

Gases have no definite shape
Gases have no definite volume
Gases can be compressed
Gases can flow

Question 8

Heat Energy

Answer 8

In order for a substance to change state(from a solid to a liquid , or liquid gas) it needs heat energy

Question 9

Latent heat

Answer 9

As a substance changes state , it uses latent heat. There is no change to temperature, but the state of the material changes

Question 10

Condensation

Answer 10

Is the changing of a gas to a liquid

Question 11

Diffusion

Answer 11

Is the movement of particles from an area of high concentration to an area of low concentration e.g. spray purfume in one corner of the room,and it spreads to the rest of the room

Question 12

Plasma

Answer 12

Is the fourth state of matter , like , gas , but can conduct electricity

Question 13

Physical change

Answer 13

No change in particles , just the particle arrangement and energy, easy to reverse e.g. mixing water and salt

Question 14

Chemical change

Answer 14

A chemical reaction takes place and a new substance is formed , very difficult to reverse e.g. burning a match

Question 15

During a chemical reaction

Answer 15

The atoms rearrange to form a new substance. Might be seen by colour change , temperature change , light being emitted or bubbles

Question 16

Law of conservation of mass

Answer 16

Matter can be changed from one form to another. During physical and chemical changes , the I no overall change in mass

Question 17

Mixture

Answer 17

A mixture consists of two or more substances mingled together but not chemically combined e.g. same and water

Question 18

There are four methods of separating mixtures

Answer 18

1. Filtration
2. Evaporation
3. Distillation
4. Chromatography

Question 19

Filtration

Answer 19

Used to separate small insoluble solids ( do not dissolve in the liquid) form a liquid by using filter paper and funnel to trap the solids e.g. sand and water

Question 20

Evaporation

Answer 20

Used to separate soluble solids ( dissolve in liquids ) from a solution by evaporating off the liquid to leave the solids e.g. salt and water

Question 21

Distillation

Answer 21

Used to separate two liquids with different boiling points such as alcohol (boils at 78) and water (boils at 100) . Also used to separate a soluble solid from a liquid (e.g. seawater) to give a pure sample of each

Question 22

Chromatography

Answer 22

Used to separate a mixture of dissolved substances in a solution. E.g. the different colours in a black marker