Chapter 1B Matter

In the expression H2O the 2 represents....

• 2 atoms of hydrogen.

• 2 atoms of oxygen.

• 2 molecules of water.

• 2 molecules of hydrogen peroxide.

An ice cube is ....

• water vapor.

• a liquid.

• a solid.

• a gas.

An example of a compound is .....

• salt.

• carbon.

• oxygen.

• hydrogen.

When a piece of paper is folded, the property that has been changed is its....

• shape.

• color.

• texture.

• magnetism.

Oxygen and hydrogen can combine to form....

• salt.

• water.

• rust.

• carbon dioxide.

Select the states of matter.

• solid

• liquid

• gas

• plasma

What is a mixture?

• When 2 or more elements are combined to create a new substance.

• When 2 or more substances are combined together and the pieces can be easily separated.

• When 2 or more molecules are combined together and the pieces can be easily separated.

• When 2 or more atoms are combined together and the pieces can be easily separated.

What is a compound?

• When 2 or more elements are combined to create a new substance.

• When 2 or more mixtures are combined to create a new substance.

• When 2 or more atoms are combined to create a new substance.

• When 2 or more molecules are combined to create a new substance.

An example of a change that is NOT a chemical change is .....

• batter baked into a cake.

• cut apples turning brown in the air.

• cucumbers tossed with lettuce for a salad.

• a green tomato turning red when it ripens.

Iron atoms combine with oxygen atoms to form....

• fool's gold.

• rust.

• ashes.

• carbon dioxide.