test 1 review

Question 1

pure substances are

Answer 1

elements/compounds

Question 2

element

Answer 2

Pure substances/ made up of one atom

Question 3

mixtures:

Answer 3

2 compounds or elements physically put together

Question 4

compound:

Answer 4

2 or more elements that are physically combined

Question 5

solid

Answer 5

definite shape/ volume

Question 6

liquid

Answer 6

change shape but definite volume

Question 7

gas

Answer 7

indefinite shape/volume

Question 8

homogeneous

Answer 8

same throughout

Question 9

matter

Answer 9

has mass and takes up space

Question 10

heterogeneous

Answer 10

can pick out parts

Question 11

properties

Answer 11

the characteristics that give substances its unique identity

Question 12

chemical properties

Answer 12

things that show a substance is chaning into another substance
EX: flammability, corrosiveness, reactivity with acids/water,

Question 13

physical properties

Answer 13

can be observed without changing the substance
EX: color, melting point, density, electrical, brittleness, taste, smell,

Question 14

extensive properties

Answer 14

amount of substance
EX: mass, weight

Question 15

intensive properties

Answer 15

type of substance
EX: color

Question 16

mass

Answer 16

how much matter something has

Question 17

combined units

Answer 17

derived units

Question 18

density

Answer 18

amount of matter that water has

Question 19

density equasion

Answer 19

mass/ volume

Question 20

accuracy

Answer 20

how close you are to the true value

Question 21

precision

Answer 21

repeatability

Question 22

how many sig figs
513.42

Answer 22

5

Question 23

how many sig figs
2.005

Answer 23

4

Question 24

how many sig figs
70000000000

Answer 24

1

Question 25

0.00740

Answer 25

3

Question 26

9m to cm

Answer 26

900 cm

Question 27

14.50 m to cm

Answer 27

1450 cm

Question 28

8 cm to m

Answer 28

0.08 m

Question 29

15 kg to grams

Answer 29

15000. g

Question 30

145 g to kg

Answer 30

0.145 kg

Question 31

946 ml to L

Answer 31

0.946 L

Question 32

43.2 L to mL

Answer 32

43200 mL

Question 33

54.3 mg to g?

Answer 33

0.0543 g

Question 34

100 C to K

Answer 34

373 K

Question 35

34 cm3 to mL

Answer 35

34mL

Question 36

independent variable

Answer 36

what you change/add

Question 37

dependent variable

Answer 37

what you measure

Question 38

control

Answer 38

the thing you don't change

Question 39

constants

Answer 39

the variables that have to stay the same