Classifying Matter

A molecule is the smallest part of what?

• an element

• a compound

• a substance

• an atom

A mixture of iron and sulfur can be separated by what?

• magnetic attraction

• distillation

• evaporation

• filtration

Compounds are formed as a result of what?

• physical combination

• chemical combination

• distillation

• filtration

The ratio of hydrogen atoms to sulfur atoms in sulfuric acid H2SO4.

• 2 to 4

• 1 to 2

• 2 to 1

• 1 to 4

Salad dressing is an example of what type of mixture?

• heterogeneous mixture

• homogeneous mixture

• it is not a mixture

• it is an element

The simplest type of substance is what?

• compound

• element

• mixture

• salt

When elements combine to form compounds, their properties do what?

• stay the same

• change

• always heat up

• always cool down

H2O is the chemical _______________ for water.

• symbol

• formula

• water

• change

Substances in a mixture keep their own _______________.

• properties

• shape

• size

The substances in a heterogeneous mixture can usually be seen and are easily separated.

• True

• False