Physical Science Vocabulary

Question 1

Element

Answer 1

Pure substances made of only one type of atom

Question 2

Atom

Answer 2

The basic unit of matter made up of protons, neutrons, and electrons

Question 3

Molecule

Answer 3

A group of two or more elements held together by bonds

Question 4

Compound

Answer 4

A molecule with two or more DIFFERENT elements

Question 5

Cohesion

Answer 5

Causes water molecules to stick together and form droplets

Question 6

Adhesion

Answer 6

Causes water molecules to stick to other things (ie: windows, spiderwebs, leaves, etc) and is stronger than cohesion

Question 7

Physical Properties:

Answer 7

Characteristics that you can observe without a chemical reaction.

Question 8

Chemical Properties

Answer 8

A characteristic that you observe through a chemical reaction

Question 9

Chemical Reaction

Answer 9

The action of one or more substances converted into one or more DIFFERENT substances

Question 10

Reactant

Answer 10

Elements or compounds which exist PRIOR to a chemical reaction

Question 11

Product

Answer 11

New substances that are created by the rearranging of atoms AFTER a chemical reaction

Question 12

Combustion

Answer 12

A chemical reaction to create burning

Question 13

Air pressure

Answer 13

The force exerted on a surface by the air above it as gravity pulls it to earth