New cards

scientific method

a logical approach to solving problems by observing and collecting data

New cards

New cards

system

a specific portion of matter in a given region of space that has been selected for study

New cards

New cards

hypothesis

a testable statement

New cards

New cards

model

an explanation of how phenomena occur and how data or events are related

New cards

New cards

theory

a broad generalization that explains a body of facts or phenomena

New cards

New cards

quantity

something that has magnitude, size, or amount

New cards

New cards

SI

a single measurement system called Le Systeme International d'Unites

New cards

New cards

weight

a measure of the gravitational pull on matter

New cards

New cards

derived units

combinations of SI base units

New cards

New cards

volume

amount of space occupied by an object

New cards

New cards

density

the ratio of mass to volume, or mass divided by volume

New cards

New cards

conversion factor

a ratio derived from the equality between two different units

New cards

New cards

dimensional analysis

a mathematical technique that allows you to use units to solve problems

New cards

New cards

accuracy

the closeness of measurements to the correct value of quantity measured

New cards

New cards

precision

the closeness of a set of measurements of the same quantity made in the same way

New cards

New cards

percentage error

calculated by subtracting the accepted value from the experimental value

New cards

New cards

significant figures

consists of all the digits known with certainty, plus one final digit, which is estimated

New cards

New cards

scientific notation

numbers written in the form M x 10^n, M is greater or equal to 1, but less than 10. N forms the number.

New cards

New cards

directly proportional

two quantities that can be divided by each other and give a constant value

New cards

New cards

inversely proportional

dividing the difference by the accepted value, and then multiplying by 100

New cards