Chapter 1

Question 1

Matter

Answer 1

has mass and occupies space

Question 2

Gas

Answer 2

no fixed volume

Question 3

liquid

Answer 3

distinct volume, no shape; takes shape of container

Question 4

solid

Answer 4

definite volume and shape

Question 5

element

Answer 5

can’t be decomposed in simpler substances
Ex. one kind of atom (Ag)

Question 6

compound

Answer 6

composed of more than one kind of element
Ex. H2O

Question 7

atom

Answer 7

single, smallest building block of matter

Question 8

molecule

Answer 8

2 or more atoms bonded together in specific ratios and shapes

Question 9

diatomic elements

Answer 9

“Have no fear of ice cold beer”
Hydrogen
Nitrogen
Fluorine
Oxygen
Iodine
Chlorine
Bromine

Question 10

pure substance

Answer 10

whose properties are uniform regardless of sample

Question 11

mixture

Answer 11

combinations of pure substances; composition can vary

Question 12

homogeneous

Answer 12

uniform throughout
ex. Jello, clean air

Question 13

heterogeneous

Answer 13

not uniform throughout
ex. concrete, polluted air

Question 14

physical property

Answer 14

can be measured without changing identity
ex. color, melting point

Question 15

chemical property

Answer 15

how something reacts; substance loses identity

Question 16

intensive property

Answer 16

does not depend on amount
ex. boiling point, density

Question 17

extensive property

Answer 17

depends on quantity
ex. mass, volume

Question 18

physical changes

Answer 18

changes physical appearance
ex. ice melting

Question 19

chemical changes

Answer 19

substance is converted into new substance
ex. rust

Question 20

length

Answer 20

meter (m)

Question 21

mass

Answer 21

kilogram (kg)

Question 22

temperature

Answer 22

kelvin (K)

Question 23

time

Answer 23

seconds (s/sec)

Question 24

amount

Answer 24

moles (mol)

Question 25

electric current

Answer 25

ampere (a/amp)

Question 26

luminous intensity

Answer 26

candela (cd)

Question 27

gas (molecular level)

Answer 27

molecules are far apart and moving at high speeds; collide frequently with one another and the walls of the container

Question 28

liquid (molecular level)

Answer 28

molecules are packed closely together but still move rapidly (allowing them to pour easily)