Croom Physics chapter 1

1. identify a problem

2. Perform research

3. create a hypothesis

4. test hypothesis

5. interpret results

6. create rule

what are the 6 steps of the scientific method

hypothesis

a tentative statement about the natural world leading to deductions that can be tested, must be reasonable, must be testable, and must not be an opinion

fact

something compenant observers agree upon and is a hypothesis has been tested over and over with the same general results

law

a generalization that tells what happens but not why it happens

theory

tells why something happens

length, mass, time, electric current, temperature, amount of substance, and intensity of light

what are the 7 SI base units

giga (G, +9), mega (M, +6), kilo (k, +3), hecta (h, +2), deka (da, +1), deci (d, -1), centi (c, -2), milli (m, -3), micro (-6), nano (n, -9)

what are the metric prefixes

vernier calliper

what is this

micrometer

what is this

accuracy

the nearness of a measurement/ measurements to the true value/average

precision

how close several measurements are to each other (more important)

standard deviation & average deviation from the mean (a.d)

what two equations test for precision

standard error & average deviation of the mean (A.D)

what two equations test for accuracy

the smallest number of decimal spot

what is the sig fig rule for addition & subtraction

the smallest number of sig figs

what is the sig fig rule multiplication & division