Year 8 Test 2

Question 1

Properties of solids

Answer 1

Cannot be poured except salt sand and sugar

Fixed shape and volume

Question 2

Properties of liquids

Answer 2

Has a fixed volume but no fixed shape
When a liquid is poured it will take the shape of the container
If pouring continues it will overflow

Question 3

Properties of gas

Answer 3

Has no fixed shape or volume
Gases can be compressed
Gases spread out and will not stay in a container unless it has a lid

Question 4

Fluid

Answer 4

A substance that flows and has no fixed shape, gases and liquids are fluids

Question 5

Measuring the volume of solids and liquids

Answer 5

The volume of a solid is usually measured in cubic metres

The volume of a liquid is measured in millilitres

Question 6

How mass is measured

Answer 6

Mass is measured with an electronic scale or beam balance

Question 7

Boiling

Answer 7

The boiling point of the liquid is the temperature at which the liquid boils the temperature at which a changes from a liquid to a gas. Boiling point of water is that 100 degrees

Question 8

Freezing

Answer 8

The change of matter from a liquid to a solid. A liquid turns into a solid when the heat is transferred away from it

Question 9

Condensation

Answer 9

If a gas comes into contact with a cold surface it can turn into a liquid

Question 10

Sublimation

Answer 10

Sublimation is when a solid goes to a gas state without passing through the liquid state

Question 11

evaporation

Answer 11

Evaporation occurs when a liquid changes to a gas

Question 12

For major assumptions of the particle model of matter

Answer 12

• All substances are made up of tiny particles
• the tiny particles are attracted towards of the surrounding particle
• the particles are always moving
• the hotter the substance is the faster the particles move

Question 13

Gases under pressure

Answer 13

Want to gas is under pressure it will compress Until it is unable to compress more

Question 14

Scientists

Answer 14

People skilled in or working in the fields of science; scientists use experiments to find out about the material world around them

Question 15

Properties

Answer 15

Characteristics or features of an object or substance

Question 16

Diffusion

Answer 16

The spreading of one substance to another due to the movement of their particles

Question 17

Mass

Answer 17

The quantity of matter in an object (usually measured in grams or kilograms)

Question 18

Volume

Answer 18

The amount of space taken by an object or substance

Question 19

Particle model

Answer 19

A description of the moving particles that make up all matter and how they behave. The model explains the properties of solids liquids and gases

Question 20

Expands

Answer 20

Increase in size due to the movement of particles in a substance

Question 21

Contracts

Answer 21

Shorten or become smaller in size

Question 22

Alchemists

Answer 22

Olden day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Alchemist also tried to tell the future.

Question 23

Investigation

Answer 23

Activity aimed at finding information

Question 24

observation

Answer 24

Information obtained by the use of our senses measuring instruments

Question 25

Compound

Answer 25

Substance made up of two or more different types of atoms that have been joined together

Question 26

Bond

Answer 26

Force that holds particles of matter such as atoms together

Question 27

Mixture

Answer 27

A combination of substances in which each keeps its own properties