Chemistry

Question 1

Matter

Answer 1

Anything that occupies space and has mass.

Question 2

Mass

Answer 2

Is the amount of matter in a object.

Question 3

3 states of matter

Answer 3

Solid, liquid ,gases

Question 4

Properties of solids

Answer 4

Solids have :
Definite shape
Definite volume
Can’t be compressed
Can’t flow

Question 5

Properties of liquids

Answer 5

Liquids have :
No definite shape
Definite volume
Can’t be comprossed
Can flow

Question 6

Gases

Answer 6

Gases have :
No definite shape
No definite volume
Can be compressed
Can flow

Question 7

Energy

Answer 7

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

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

Question 8

Melting point

Answer 8

The melting point is when both the solid and liquid state exist together (changing from solid to liquid ).

Question 9

The boiling point

Answer 9

The boiling point of a liquid is when evaporation begins to happen throughout the liquid (changing from liquid gas).

Question 10

Condensation

Answer 10

Condensation is changing of a gas to a liquid.

Question 11

States of matter

Answer 11

Solid
Liquid
Gas
Plasma

Question 12

Diffusion

Answer 12

Is the movement of particles from a high concentration to an area of low concentration e.g spray perfume in one corner of the room and then in a while it will travel into the other

Question 13

Mixture

Answer 13

A mixture consists of two or more substances mingled together but not chemically combined e.g
sand and water.
There are 4 methods of separating mixtures
1. Filtration
2.Evaporation
3.Distillation
4.Chromatography

Question 14

Four states of matter. Plasma us the fourth state of matter like Gad but can conduct electricity

Question 15

Filtration

Answer 15

Used to separate small insoluble solids( do not dissolve in a liquid) from a liquid by using filter paper and a funnel to trap the solids.
Pg177

Question 16

Evaporation

Answer 16

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

Question 17

physical change

Answer 17

no change in particals . just the particle arrangement and energy. easy to reverse e.g mixing salt and water

Question 18

chemical change

Answer 18

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

Question 19

durning a chemical reaction

Answer 19

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

Question 20

matter can be changed from one form to another, during a physical and chemical changes there is no overall change in mass

Question 21

distillation

Answer 21

is used to separate two liquids with different boiling points such as alcohol (boils at 78 degrees) ans water (boils at 100 degrees).also used to separate a soluble solid to liquid( e.g sea water ) to give our 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.

Question 23

residue

Answer 23

the soil left in filter paper after filtration

Question 24

filtrate

Answer 24

the clean water that comes after filtration

Question 25

solvent

Answer 25

a liquid that a solid has dissolved into

Question 26

solute

Answer 26

the solid that is left behind after evaporation

Question 27

distillation

Answer 27

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

Question 28

miscible

Answer 28

liquids that mis together e.g alcohol and water 💧

Question 29

liebig condenser

Answer 29

piece of equipment used in distillation in which cools water flows to condense steam to water

Question 30

Products

Answer 30

the substances formed after a
chemical reaction

Question 31

Reactant:

Answer 31

chemicals that react together in a
chemical reaction

Question 32

• chromatogram

Answer 32

• chromatography paper with
  separated ink