Unit 2 Terms

Question 1

Matter

Answer 1

Anything that takes up space

Question 1

Density

Answer 1

Ratio that compares the mass of an object to its volume.
Mass/Volume

Question 2

Physical Property

Answer 2

Qualities that dont change the original substance.

Question 3

Chemical Property

Answer 3

Qualities that are different from the original substance.

Question 4

Chemical Change

Answer 4

a change of materials into another, new materials with different properties and one or more than one new substances are formed.

Question 5

Physical Change

Answer 5

During a physical change, neither the composition nor the chemical nature of matter is changed.

Question 6

Law of conservation of mass

Answer 6

Mass is neither created or destroyed, only rearraged or changed.

Question 7

Chemical Symbol

Answer 7

Ex. Hydrogren=H, B=Boron

Question 8

Reactants

Answer 8

Starting componds in a chemical equation

Question 9

Products

Answer 9

The product of a chemical equation

Question 10

Chemical Reaction

Answer 10

a chemical change that occurs when two or more substances combine to form a new substance.

Question 11

Chemical Formula

Answer 11

an expression that shows the elements in a compound

Question 12

Precipitate

Answer 12

a substance separated from a solution or suspension by chemical or physical change

Question 13

Endothermic

Answer 13

Gives off heat
ex. hot hands

Question 14

Exothermic

Answer 14

Uses heat energy
ex. ice pack