Keywords

Question 0

State of matter

Answer 0

Solid, Liquid or Gas

Question 1

What is Diffusion?

Answer 1

Movement of particles from a region if high concentration to a region of low concentration

Question 2

Particle Theory

Answer 2

Theory that describes the arrangement and movement of particles in solids, liquids and gases.

Question 3

Atom

Answer 3

Smallest particle of matter

Question 4

Group

Answer 4

Vertical column in the periodic table.

Elements in a group have similar properties.

Question 5

Period

Answer 5

Horizontal row in a periodic table

Question 6

Property

Answer 6

Characteristics of a substance ( what do they look like/do?)
E.g. Shiny, malleable, conducts electricity

Question 7

Element

Answer 7

Something that only has 1 type of atom

Question 8

Compound

Answer 8

Something with more than one atom chemically joined together. It has a fixed ratio.

Question 9

Mixture

Answer 9

A mixture of elements a compounds in any ratio.

Question 10

Thermal Decomposition

Answer 10

The breaking down of a substance into simpler substances using heat

Question 11

Limewater

Answer 11

Is the test for carbon dioxide. If it’s present it will turn cloudy

Question 12

Electrolysis

Answer 12

The decomposition of a compound into simpler substances by electricity.

Question 13

Anode

Answer 13

The positive electrode

Question 14

Cathode

Answer 14

The negative electrode

Question 15

Electrolyte

Answer 15

The solution containing ions to be electrolysed

Question 16

Ion

Answer 16

A charged particle

Question 17

Isotope

Answer 17

An element with the same number of protons BUT a different number of neutrons

Question 18

Electron Arrangement

Answer 18

The electrons are arranged in ‘shells’ or energy levels

Question 19

Atomic Mass

Answer 19

= number of protons and neutrons in the nucleus

Question 20

Atomic Number

Answer 20

Number of protons

Question 21

Proton

Answer 21

Positively charged particle in the nucleus with a mass of 1

Question 22

Electrons

Answer 22

Very small negatively charged particles found in the nucleus in shells

Question 23

Neutrons

Answer 23

Particle found in the nucleus of the atom with a mass of 1 and no charge

Question 24

Combustion

Answer 24

Combustion occurs when a substance reacts with oxygen releasing energy mainly in the form of light and heat Combustion is an oxidation reaction. The substance burnt gains oxygen and gets heavier.

Question 25

Corrosion

Answer 25

The process by which a metal reacts with oxygen in the air to form a metal oxide on the surface.

Question 26

Rusting

Answer 26

Corrosion of iron or steel

Question 27

Rust

Answer 27

Iron Oxide

Question 28

Sacrificial Protection

Answer 28

Adding a more reactive metal to iron and corrodes instead of the iron.

Question 29

Galvanising

Answer 29

Coating iron in zinc

Question 30

Oxidation

Answer 30

When a substance gains oxygen

Question 31

Reduction

Answer 31

When a substance loses oxygen

Question 32

Fuel

Answer 32

A substance which reacts rapidly with oxygen, giving out heat

Question 33

Neutralisation

Answer 33

When an acid reacts with a base

Question 34

Base

Answer 34

Substance or solution that will neutralise an acid

Question 35

Independent Variable

Answer 35

Variable you choose to change (x axis)

Question 36

Dependent Variable

Answer 36

Variable you measure (y axis)

Question 37

Control Variable

Answer 37

Variables that remain unchanged

Question 38

Dilute

Answer 38

A solution with lots of dissolved chemical per litre

Question 39

Rate

Answer 39

The speed of a reaction (change in concentration over time)

Question 40

Concentrated

Answer 40

A solution with less dissolved chemical per litre

Question 41

Precise

Answer 41

Using equipment with a smaller scale

Question 42

Accurate

Answer 42

Close to the true value