2.2 Changes in Matter

A change which alters a substance without changing its composition, is a ................................. change.

• chemical

• physical

• nuclear

• biological

Formation of rust is a ..................................combination of iron and oxygen in moist air.

• chemical

• physical

• nuclear

• biological

When food rots, new substances are formed due to ...............................change.

• chemical

• physical

• nuclear

• biological

A process that involves one or more substances changing into new substances is called a ...............................change.

• chemical

• physical

• nuclear

• biological

The state of matter depends on the ........................................................................ of the surroundings.

• temperature and volume

• mass and pressure

• temperature and pressure

• density and mass

As temperature and pressure change, all substances undergo a change from one state (or phase) to another.

• True

• False

A .............................change is a transition of matter from one state to another.

• nuclear

• chemical

• phase

Occur when a gas is in contact with a cool surface, causing droplets to form

• Condensation

• Evaporation

• Solidification

• Melting

Occurs when a liquid cools. Water dripping from the roof forms icicles as it cools.

• Solidification

• Melting

• Condensation

• Evaporation

Phase changes associated with water make up the ..............................., which allows life to exist on Earth.

• nitrogen cycle

• oxygen cycle

• carbon dioxide cycle

• water cycle