Chapter 2 Vocab Flashcards
(19 cards)
Model
An explanation of how phenomena occur and how data or events are related
Hypothesis
A testable statement
Scientific method
A logical approach o solving problems by observing and collecting data, forming a hypothesis, testing a hypothesis, and formulating theories that are supported by the data
System
A specific proportion of matter in a given region of space that has been selected for a study during an experiment or observation
Theory
A broad generalization that explains a body of facts or phenomena
Conversion factor
A ratio derived from the equality between two different units that can be used to convert from one unit to the other
Density
The ratio of mass to volume, or mass divided by the volume
Derived unit
Combinations of SI base units
Quantity
Something that has magnitude, size, or amount
SI
International measurement system called Le Système International d’Unités
Volume
The amount of space occupied by an object
Weight
A measure of the gravitational pull on matter
Accuracy
Refers to the closeness of measurements to the correct or accepted value of quantity measured
Directly proportional
Two quantities that by dividing one by the other gives a constant value
Indirectly proportional
Two quantities that their product is a constant
Percent error
Calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value, and then multiplying by 100
Precision
Refers to the closeness of a set of measurements of the same quantity made in the same way
Scientific notation
Numbers written in the form of M x 10^n where the M is a number greater than it equal to 1 but less than 10 and n is a whole number
Significant figures
In a measurement consists of all the disgust known with the certainty plus one final digit
