chapter 1

Question 1

matter

Answer 1

anything that has mass and takes up volume

Question 2

compisition

Answer 2

what something is made of

Question 3

structure

Answer 3

what something is made of and how the components are arranged

Question 4

atom

Answer 4

the fundamental unit of matter

Question 5

element

Answer 5

made up of only one type of atom

Question 6

compounds

Answer 6

composed of more than one element, bound in fixed ratios

Question 7

molecules

Answer 7

groups of atoms that bind together and behave as a single unit

Question 8

mixtures

• homogeneous
• heterogeneous

Answer 8

contain more than one substance, not bound in a fixed ratio
-components mix evenly
-components do not mix evenly
difference from compounds: can be separated into there individual components without changing the id of a substance

Question 9

solids

Answer 9

definite shape definite volume

Question 10

liquid

Answer 10

definite volume

Question 11

gas

Answer 11

no definite shape or volume

Question 12

physical properties

Answer 12

can be measured without changing the identity of a substance

Question 13

chemical properties

Answer 13

can not be measured without changing the identity of a substance

Question 14

energy

Answer 14

the ability to do work

Question 15

potential energy

Answer 15

energy that is stored

Question 16

kinetic energy

Answer 16

the energy of motion

Question 17

exothermic change

Answer 17

releases heat energy

Question 18

endothermic change

Answer 18

absorbs heat energy