Science Review FIRST EXAM

Multiple Choice

What are the three states of matter ?

• Solid , Liquid and

  glass

• Matter , liquid and glass

• Solid, liquid and gas

Multiple Choice

What is difference between an atom and a molecule .

• An atom is the smallest unit of matter an a molecule is two or more of the same atoms .

• An atom is the smallest unit of matter an a molecule is two or more atoms.

Multiple Choice

This change is a physical or chemical change?

• Chemical

• Physical

Multiple Choice

How much atoms have this equation C3H3NaO2 ?

• 9

• 8

• 10

• 11

Multiple Choice

How much different elements have this equation C20H22O3?

• 3

• 45

• 5

• 46