Unit 1 - Math and Graphing Skills

Question 1

Physics

Answer 1

the study of matter and energy

Question 2

Measurement SI system

Answer 2

distance = m
mass = kg
time =  s
temperature = K
electric current =  A
amount of substance = mol
light intensity = cd

Question 3

Purpose of significant digits

Answer 3

indicate the accuracy of a measuring instrument
they apply only to values measured with an instrument
they don’t apply to counted values or mathematically derived units

Question 4

Addition and/or subtraction

Answer 4

round off the final answer to the minimum number of decimal places

Question 5

Orders of magnitude

Answer 5

these are values that are so approximate that they have no significant digits, just exponents
the final answer to a calculation with an order of magnitude must be an order of magnitude

Question 6

Variations and graphing

Answer 6

almost all variations will be one of the following = direct, inverse, exponential, or root

Question 7

Direct variations

Answer 7

as volume increases, mass increases
if volume is doubled, mass is doubled
by dividing the variables, the constant is determined

Question 8

Inverse variations

Answer 8

as area increases, the thickness decreases
if area is doubled, thickness is halved
by multiplying the variables, the constant is determined

Question 9

Interpolation

Answer 9

the determination of a value that lies within the experimental range of data

Question 10

Extrapolation

Answer 10

the determination of a value that lies outside the experimental range of data