unit 1 test

Question 1

what is science?

Answer 1

process based on inquiry that helps develop explanations about events in nature

Question 2

what are the three categories of science?

Answer 2

life science - living things
earth science - earth and space
physical science - matter and energy

Question 3

investigations

Answer 3

a way to learn about the natural world

Question 4

the scientific method order

Answer 4

state the problem
gather info
form hypothesis
test hypothesis
analyze data
draw conclusions

Question 5

hypothesis

Answer 5

a possible explanation for a problem using knowledge and observation

Question 6

experiments

Answer 6

tests the effect of one thing on another using a control

Question 7

variables

Answer 7

a quantity that can have more than a single value

Question 8

dependent variable

Answer 8

changes according to the changes of the independent variable

Question 9

independent variable

Answer 9

changed to test the affect on the dependent variable

Question 10

constant

Answer 10

doesn’t change when the other variables change

Question 11

control

Answer 11

standard by which the test results can be compared

Question 12

bias

Answer 12

when the scientists expectations changes how the results are analyzed or the conclusions are made

Question 13

model

Answer 13

represents an idea, event, or object to help people better understand it

Question 14

theory

Answer 14

an explanation of things or events based on knowledge gained from many observations and investigations

Question 15

scientific law

Answer 15

a statement about what happens in nature and that seems to be true all the time

Question 16

standard

Answer 16

an exact quantity that people agree to use to compare measurements

Question 17

metric system

Answer 17

system of measurement based on multiples of 10

Question 18

length SI unit

Answer 18

meter (m)

Question 19

mass SI unit

Answer 19

kilogram kg

Question 20

time SI unit

Answer 20

second s

Question 21

electric current SI unit

Answer 21

ampere A

Question 22

amount of substance SI unit

Answer 22

mole mol

Question 23

intensity of light SI unit

Answer 23

candela cd

Question 24

temperature SI unit

Answer 24

kelvin k

Question 25

kilo SI prefix

Answer 25

1,000

Question 26

deci SI prefix

Answer 26

0.1

Question 27

centi SI prefix

Answer 27

0.01

Question 28

milli SI prefix

Answer 28

0.001

Question 29

micro SI prefix

Answer 29

0.000 001

Question 30

nano SI prefix

Answer 30

0.000 000 001

Question 31

volume

Answer 31

the amount of space occupied by an object

Question 32

matter

Answer 32

anything that takes up space and has mass

Question 33

mass

Answer 33

a measurement of the quantity of matter in an object

Question 34

density

Answer 34

the mass per unit volume of a material

Question 35

density equation

Answer 35

d = m/v

Question 36

freezing point celsius

Answer 36

0

Question 37

boiling point celsius

Answer 37

100

Question 38

body point celsius

Answer 38

37

Question 39

room point celsius

Answer 39

20 - 25

Question 40

coldest temp possible (absolute zero) (kelvin)

Answer 40

0

Question 41

true or false: one cm^3 and one mL are the same volume

Answer 41

true

Question 42

graph

Answer 42

a visual display of info or data

Question 43

dependent variable goes on which axis?

Answer 43

y

Question 44

independent variable goes on which axis?

Answer 44

x

Question 45

line graph

Answer 45

how relationships between variables change overtime

Question 46

bar graphs

Answer 46

useful for comparing info or displaying data that doesn’t change continuously

Question 47

circle graphs (pi charts)

Answer 47

show how some fixed quantity is broken into parts