Chemistry

Question 1

Matter

Answer 1

Anything that occupies space and had mass

Question 2

Mass

Answer 2

Is the amount of matter in a object

Question 3

3 states of matter

Answer 3

Solids liquids and gasses

Question 4

Property of solids

Answer 4

Solids have a definite shape,volume,solids can not be compressed and can’t flow

Question 5

Properties of liquid

Answer 5

Liquid

Question 6

Melting point

Answer 6

Is when both the solid and liquid state exist together changing form solid to liquid

Question 7

Boiling point

Answer 7

Of a liquid is when evaporation begins to happen thought out the liquid changing form liquid to gas

Question 8

Condensation

Answer 8

Is changing of a gas to a liquid

Question 9

Diffusion

Answer 9

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

Question 10

Plasma

Answer 10

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

Question 11

Physical change

Answer 11

No change in particles just the particle arrangement and Energy easy to reverse e.g. mixing water and slat

Question 12

Chemical change

Answer 12

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

Question 13

During a chemical reaction

Answer 13

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

Question 14

Law of conservation of mass

Answer 14

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

Question 15

Mixture

Answer 15

Consist of 2 or more substances mingled together but not chemically combined e.g. sand and water

Question 16

Four methods Of separating mixtures

Answer 16

Filtration
Evaporation
Distillation
Chromatography

Question 17

Filtration

Answer 17

Used to separate small insoluble solids(don’t dissolve this liquid) from a liquid by using filter paper and a funnel to Trap the solids e.g. sand an water

Question 18

Evaporation

Answer 18

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

Question 19

Distillation

Answer 19

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

Question 20

Chromatography

Answer 20

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

Question 21

Insoluble

Answer 21

Does not dissolve in a liquid

Question 22

Soluble

Answer 22

Dissolves in a liquid

Question 23

Residue

Answer 23

The soil left in the filter paper after filtration

Question 24

Filtrate

Answer 24

The clean water that comes after filtration

Question 25

Evaporation

Answer 25

Used to separate a soluble solid from a liquid e.g. salt and water

Question 26

Solvent

Answer 26

The liquid that a solid is dissolved into

Question 27

Solute

Answer 27

The solid that is left behind after evaporation

Question 28

Distillation

Answer 28

method of separation used to separate a soluble solid and its solvent, or two miscible liquids with different boiling points

Question 29

Miscible

Answer 29

- Liquids that mix together e.g. alcohol and

Question 30

Liebig condenser

Answer 30

- piece of equipment used in  distillation in which cool water flows to condense steam to water  Distillate - clean water at the en

Question 31

Distillate

Answer 31

Clean water at the end of distillation

Question 32

Chromatography

Answer 32

Used to separate mixtures of substances that are in solution e.g.dye in ink

Question 33

Reactant

Answer 33

chemicals that react together in a chemical reaction

Question 34

Products

Answer 34

the substances formed after a chemical reaction