Unit B - Section 1

Melting point

Evaporation

Condensation

Freezing point

Sublimation

Deposition

Characteristics that can be used to describe a substance

Identity matter; examples r colour and lustre. The temperature at which a substance melts is also a physical property

When a substance undergoes a physical change, such as melting it’s appearance or state may be altered but it’s composition stays the same

The melting point of a substance is the temperature at which it changes from solid to a liquid

The boiling point of a substance is the temperature at which it’s liquid phase changes to the gas phase

Hardness is a substance with the ability to resist being scratched

A substance that can be pounded or rolled into sheets is said to be malleable; such as gold and tin

Any solid that can be stretched into a long wire is said to be ductile

The shape of a substances crystals can help identify it

Is the ability of a substance to be dissolved in another

Is the amount of mass in a given volume of a substance

Is the ability of a substance to conduct electricity or heat

Reaction with acids Ability to burn Reaction with water Behaviour in air Reaction to heat

How a substance interacts with other substances such as acids

Results in the formation of a different substance or substances

Made up of only one kind of matter and has a unique sets it apart from any other kind of matter

Material that cannot be broken down into any simpler substance

When two or more elements combine chemically they form a compound