Unit 1.1

Question 1

physical change

Answer 1

-change in form
-reversible
-water boiling

Question 2

chemical change

Answer 2

-chemical composition change
-irreversible
-rusting, leaves changing color

Question 3

signs of a chemical change

Answer 3

-color change
-gas bubbles
-temperature (on its own)
-precipitate (solid)

Question 4

3 scientific method steps

Answer 4

-make observations (qualitative or quantitative)
-form a law or hypothesis
-form a theory

Question 5

law vs hypothesis

Answer 5

-law: summary of a set of observations
-hypothesis: a tentative explanation, more advanced, not proven

Question 6

Giga

Answer 6

G x10^9 a billion

Question 7

mega

Answer 7

M x10^6 million

Question 8

kilo

Answer 8

k x10^3 thousand

Question 9

deci

Answer 9

d x10^-1 tenth

Question 10

centi

Answer 10

c x10^-2 hundreth

Question 11

milli

Answer 11

m x10^-3 thousandth

Question 12

micro

Answer 12

M (greek) x10^-6 millionth

Question 13

nano

Answer 13

n x10^-9

Question 14

pico

Answer 14

p x10^-12

Question 15

1 inch = ?? centimeters

Answer 15

2.54cm

Question 16

1 lb =?? grams?

Answer 16

454 grams

Question 17

1 L =?? quarts?

Answer 17

1.06 quarts

Question 18

1 cm^3 or cc

Answer 18

1 mL

Question 19

1 gallon =?? quarts?

Answer 19

4 quarts

Question 20

1 foot

Answer 20

12 inches

Question 21

length unit

Answer 21

meter

Question 22

volume unit

Answer 22

liter

Question 23

time unit

Answer 23

second

Question 24

mass unit

Answer 24

kilogram

Question 25

converting C to F

Answer 25

F = (C x 1.8) +32

Question 26

converting F to C

Answer 26

C = (F-32) / 1.8

Question 27

converting C to K

Answer 27

K = C + 273.15

Question 28

when x&/ sig figs, the answer should have…

Answer 28

least number of sig figs

Question 29

when +/- sig figs, the answer should have the….

Answer 29

least number of decimal places

Question 30

Pacific and Atlantic sig fig trick

Answer 30

P —> L to R A —> R to L

Question 31

Density, matter, and volume equations

Answer 31

D = M/V V = M/D M = D x V

Question 32

accuracy

Answer 32

how close the measurement is to the accepted value (middle of the bulls eye)

Question 33

precision

Answer 33

how close a series of measurements are to one another (outside of the target)

Question 34

mass

Answer 34

measure of the amount of matter in object (balance)

Question 35

weight

Answer 35

measure of force of attraction between object and gravitational field (scale)