Unit 3 Vocabulary

Question 1

the physical material that something is made of that has unique properties

Answer 1

substance

Question 2

when a substance breaks up, is absorbed or mixes into a liquid by disappearing

Answer 2

dissolve

Question 3

when a liquid turns into a gas (vapor) due to an increase of heat

Answer 3

evaporate

Question 4

when two or more substances combine to cause a change at a molecular level

Answer 4

chemical reaction

Question 5

any change that causes a new substance to be formed that rearranges molecules, this change is usually irreversible

Answer 5

chemical change

Question 6

Usually reversible, and occurs when the form of matter is changed, but one substance is not transformed into another.

Answer 6

physical change

Question 7

a change in the state of matter of a substance

Answer 7

phase change

Question 8

mass is neither created or destroyed, the mass of an object will always remain the same despite changes to an object’s properties

Answer 8

conservation of mass

Question 9

a group of atoms bonded together, that represents the smallest part of a substance

Answer 9

molecule

Question 10

the ability for a substance to dissolve into another substance and become a part of it

Answer 10

soluble

Question 11

a substance that does not have the ability to dissolve in a liquid

Answer 11

insoluble