Ch.1 vocab terms

Question 1

science-

Answer 1

the study of nature

Question 2

scientific method-

Answer 2

set of steps used to solve a problem

Question 3

hypothesis-

Answer 3

educated guess made from previous observations and knowledge

Question 4

experiment

Answer 4

tests the effect of one thing on another using control

Question 5

variable

Answer 5

any factor that can make a change in the result of an experiment

Question 6

independent variable

Answer 6

variable changed to see how it will affect the dependent variable

Question 7

dependent variable

Answer 7

variable that changes its value according to the changes in the other variable

Question 8

constant variable

Answer 8

factor that doesn’t change in an experiment

Question 9

model

Answer 9

something created and used to represent an idea

Question 10

theory

Answer 10

an explanation of events based on knowledge gained from observation or experiments

Question 11

scientific law

Answer 11

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

Question 12

3 major categories of science

Answer 12

life
physical
earth

Question 13

6 steps of scientific method

Answer 13

identify the problem
observe(data)
hypothesis
test
analyze data
conclusion

Question 14

standard-

Answer 14

exact quantity that people agree to use to compare measurements

Question 15

volume-

Answer 15

amount of space an object takes up

Question 16

mass-

Answer 16

amount of matter in an object

Question 17

matter

Answer 17

anything that has mass and volume

Question 18

density-

Answer 18

mass per unit volume of a material (D=m/v)

Question 19

USCS length units

Answer 19

miles, yard, foot, inches

Question 20

USCS mass units

Answer 20

pound, ounces

Question 21

USCS time unit

Answer 21

seconds, minutes, hours

Question 22

USCS volume unit

Answer 22

gallon, quart, pint, cups, fl oz

Question 23

USCS temperature unit

Answer 23

Farenheit

Question 24

SI length unit

Answer 24

kilometers, meter, centimeter..

Question 25

SI mass unit

Answer 25

kilograms, grams, milligrams..

Question 26

SI time unit

Answer 26

seconds, minutes, hours..

Question 27

SI volume unit

Answer 27

liter, milliliter....

Question 28

SI Temperature unit

Answer 28

Kelvin, Celsius

Question 29

SI Base Units length

Answer 29

meter(m)

Question 30

SI Base Units mass

Answer 30

kilogram(kg)

Question 31

SI Base Units Time

Answer 31

second(s)

Question 32

SI Base Units electric current

Answer 32

ampere(A)

Question 33

SI Base Units Temperature

Answer 33

Kelvin(K)

Question 34

SI Base Units amount of substance

Answer 34

mole(mol)

Question 35

SI Base Units intensity of light

Answer 35

candela(cd)

Question 36

graph-

Answer 36

visual display of information

Question 37

independent which axis?

Answer 37

x axis

Question 38

why are graphs used for

Answer 38

graphs make it easier to detect and understand patterns.

Question 39

independent which axis?

Answer 39

x axis

Question 40

dependent which axis?

Answer 40

y axis

Question 41

Technology-

Answer 41

application of scientific knowledge to benefit people

Question 42

line graph-

Answer 42

show how a relationship between variables change over time

Question 43

bar graph-

Answer 43

useful for comparing data (does not change)

Question 44

circle graph-

Answer 44

used to show how some fixed quantity is broken into parts

Question 45

which is denser? aluminum or hydrogen

Answer 45

aluminum

Question 46

which is denser? oxygen or iron

Answer 46

iron

Question 47

which is denser? water or gold

Answer 47

gold