2) Which is not an example of matter?

Question

A. water
B. air(i think it this one)
C. gold
D. sound

3) The amount of space an object occupies is called its .....
A. volume(i think it this one)
B. mass
C. electricity
D. gravity

4) Atoms in a molecule are joined together by..
A. chemical bonds(i think it this one)
B. magnetism
C. electricity
D. gravity

Answer 1

air is about 80% Nitrogen and 20% Oxygen both of which are matter.
guess again

3) volume is correct

4) is correct although actually chemical bonds are electrical in the end.