Chemical change

Question 1

Physical property

Answer 1

properties that you can observe using our five senses or being able to measure it directly.

Question 2

Chemical property

Answer 2

When the property’s substance gets mixed with a different substance in order to create a new chemical or create 2 or more chemicals when the substances break up.

Question 3

Flammability

Answer 3

Whenever a substance can catch fire.

Question 4

Reactivity

Answer 4

Whenever a substance gets a displacement from another substance (usually done with metals).

Question 5

Toxicity

Answer 5

If a substance can cause a danger for your health when combined with your body’s substances.

Question 6

Solid

Answer 6

When the particles are in close contact with each other and cannot change shape easily.

Question 7

Liquid

Answer 7

A state of matter where the particles are a bit far apart from each other but can take shape easily.

Question 8

Gas

Answer 8

An air-like fluid substance which expands freely to fill any space available, irrespective of its quantity.

Question 9

Melting

Answer 9

The process when a solid changes into a Liquid.

Question 10

Evaporation

Answer 10

The process of a liquid changing into a Gas.

Question 11

Condensation

Answer 11

The process of a Gas turning into a liquid.

Question 12

Freezing

Answer 12

Another word for solidification.

Question 13

Solidification

Answer 13

The process of a Liquid turning into a solid.

Question 14

Sublimation

Answer 14

When a solid turns into a Gas.

Question 15

Deposition

Answer 15

The process of turning a Gas into a Solid.

Question 16

Desublimation

Answer 16

Another word for the process of Deposition.

Question 17

Reaction rate

Answer 17

The rate of which reactions occur.

Question 18

Catalyst

Answer 18

A chemical that can start or speed up a chemical reaction.

Question 19

Rusting

Answer 19

The corrosion of metals

Question 20

Corrosion

Answer 20

When a substance eats away another substance.

Question 21

Rust

Answer 21

The chemical reaction with metals, water and oxygen.

Question 22

Surface corrosion

Answer 22

Covering a metal surface from rust.

Question 23

Galvanising

Answer 23

Covering a metal with a more reactive metal.

Question 24

burning

Answer 24

combining a substance with oxygen in a flame

Question 25

Oxidation

Answer 25

a chemical reaction involving the loss of electrons by a substance

Question 26

fossil fuel

Answer 26

substance, such as coal, oil and natural gas, that has formed from the remains of ancient organisms. Coal, oil and natural gas are often used as fuels; that is, they are burnt in order to produce heat.

Question 27

combustion

Answer 27

the process of combining with oxygen, most commonly burning with a flame