Chapter 8

Question 1

Physical Properties

Answer 1

Properties that you can either observe using your five senses — seeing, hearing, touching, smelling and tasting — or measure directly

Question 2

Chemical Properties

Answer 2

Properties that describe how a substance combines with other substances to form new chemicals or how a substance breaks up into two or more different substances

Question 3

Flammability

Answer 3

An indicator of how easily a substance catches fire

Question 4

Reactivity

Answer 4

A measure 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 when poisonous substances combine with chemicals in your body to produce new substances and damaging effects

Question 6

Chemical Change

Answer 6

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

Question 7

Evaporate

Answer 7

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

Question 8

State

Answer 8

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

Question 9

Physical Change

Answer 9

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.