Molecules or Compounds

Air is a mixture of several different kinds of molecules.

• True
• False

The tiniest bit of water that still is water is a molecule of water.

• True
• False

An oxygen molecule usually has two oxygen atoms.

• True
• False

Hydrogen is a compound.

• True
• False

The properties of a compound are always the same as the properties of the elements in the compound. 

• True
• False

Carbon dioxide is a compound.

• True
• False

Fleece is a material that can be made from recycled plastic soda bottles.

• True
• False

"Bone cement" is made up of one atom of hydrogen and two atoms of oxygen. 

• True
• False

Many new materials are made up of a few kinds of molecules joined together in very long chains.

• True
• False

Salt is an example of a compound.

• True
• False