Chemical & Physical Change

Question 1

Change that results in a new substance being formed. During a chemical change, some chemical bonds break and others form

Answer 1

Chemical Change

Question 2

Change state from a liquid to a gas. Evaporation occurs only from the surface of a liquid

Answer 2

Evaporation

Question 3

Condition or phase of a substance. The three main states of matter are solid, liquid and gas

Answer 3

State

Question 4

Change in which no new chemical substances are formed. A physical change may be a change in shape, size or state. Many physical changes are easy to reverse

Answer 4

Physical Change

Question 5

The corrosion of iron

Answer 5

Rusting

Question 6

A chemical reaction that wears away a metal. Air, water or chemicals in air and water, as well as many household substances, can be corrosive. Many acids and other corrosive substances are dangerous.

Answer 6

Corrosion

Question 7

A brown substance formed when iron reacts with oxygen and water

Answer 7

Rust

Question 8

Coating over a metal surface to prevent corrosion

Answer 8

Surface protection

Question 9

Protecting a metal by covering it with a more reactive metal that will corrode first

Answer 9

Galvanising

Question 10

Combining a substance with oxygen in a flame

Answer 10

Burning

Question 11

Chemical reaction involving the loss of electrons by a substance

Answer 11

Oxidation

Question 12

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

Answer 12

Fossil Fuel

Question 13

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

Answer 13

Combustion