Matter Unit

The symbol "C" as in carbon represents:

• an element

• a compound

• an atom

• a molecule

A sample of matter made from identical particles is called

• an atom

• a compound

• an element

• a mixture

At what temperature is water more than likely changed to water vapor:

• -10 degrees C

• 20 degrees c

• 90 degrees C

• 120 degrees C

When water changes phases, it is an example of:

• a chemical change

• a radical change

• an electrical change

• a physical change

When ice floats on cold water, what does that say about its density?

• The ice is more dense than the cold water.

• The cold water is more dense than the ice cube.

• The ice cube doesn't have density.

• The density of both the cold water and the ice cube are the same.

If a student wants to determine the density of a substance and knows the volume, what other information is needed?

• the size

• the boiling point

• the melting point

• the mass

At what state are atoms spread apart the most?

• at the liquid state

• at the gas state

• at the solid state

• at the molecular state

When water changes from a liquid to a gas, what occurs?

• The atoms lose electrons.

• A new compound is formed.

• Molecules spread father apart.

• Carbon is formed.

Which does 13.0 grams represent?

• the mass

• the density

• the volume

• the speed

Why would a tree branch float on water?

• Wood is buoyant.

• Wood is more dense than water.

• Wood is magnetic.

• Wood is sturdy.