Chapter 8 Chemical Change

Question 1

Physical properties

Answer 1

Properties you can physically observe with your 5 senses

Question 2

Chemical properties

Answer 2

Properties that describe how a substance Moines with other substances to form new chemicals

Question 3

Flammability

Answer 3

An indicator of how easily a substance can catch fire

Question 4

Reactivity

Answer 4

An indication of how likely a particular metal is to take part in a displacement reaction

Question 5

Toxicity

Answer 5

The danger to your health caused from poisonous substances

Question 6

Chemical change

Answer 6

Change that results in 2 substances forming a new substance

Question 7

State

Answer 7

Condition or phase of a substance

Question 8

Physical change

Answer 8

Change in size, shape or colour but not composition

Question 9

Chemical reaction

Answer 9

A chemical change in which one or more new chemical substances are produced

Question 10

Reactants

Answer 10

Chemical substance used up in a chemical reaction.

Question 11

Products

Answer 11

New chemical substance that results from a chemical reaction

Question 12

Precipitate

Answer 12

Solid created during chemical reaction, the solid goes down and precipitates at the bottom

Question 13

Reaction rate

Answer 13

Speed at which reaction takes place

Question 14

Enzymes

Answer 14

Special chemicals that speed up reactions but are not used up themselves.

Question 15

Catalyst

Answer 15

Chemical that helps speed up chemical reaction

Question 16

Rusting

Answer 16

The corrosion of iron

Question 17

Corrosion

Answer 17

Chemical reaction that wears away a metal

Question 18

Rust

Answer 18

Substance former when oxygen reacts with oxygen and water

Question 19

Surface protection

Answer 19

Coating over a metal surface to prevent corrosion

Question 20

Galvanising

Answer 20

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

Question 21

Burning

Answer 21

Combining a substance with oxygen in a flame

Question 22

Oxidation

Answer 22

Chemical reaction involving the loss of electrons by a substance

Question 23

Fossil fuel

Answer 23

Substance, such as coal oil and natural gas formed from dead plants and animals

Question 24

Combustion

Answer 24

The process of combing oxygen with a burning flame