Midterms Flashcards
scientific literacy
the set of skills & background knowledge necessary for being a competent scientist
primary goal of science
to describe the phenomena that make up the universe (including our world)
physics
the study of how the universe works, what the universe is made of, & how the universe is structured
scientific models
desc’s of the universe
- verbal desc’
- graphs/pics
- mathematical equations
- combos of the above
scientific law
the pinnacle of scientific desc
description of a phenomenon (relationship among varialbes) thought 2 be universal
usually mathematical
proportional reasoning
figuring out how a change in 1/more variables in an equation affects another variable
direct variation
when a change in 1 variable produces an equal change in another variable, we say that those 2 variables are “directly proportional”
inverse variation
when a change in 1 variable produces a reciprocal change in another variable, we say that they’re “inversely proportional” or that they “vary inversely”
general form L = 1/M
joint variation
Equation: c = 5ab
variable c is jointly proportional to a and b. means that c is directly proportional to both a and b
doubling a causes c to double
doubling b causes c to double
doubling bouth a and b causes c to quadruple
What 3 things does a measurement indicate?
magnitude
unit
property/quantity being measured
composite/derived property/quantity
prop’s/quant’s derived from (made up of) 2/more other quant’s
What kind of units do comp/derived prop’s/quant’s have?
composite units
composite units
units tht r actually made up of other, more fundamental units
how many fund prop’s r there?
7
fund prop’s/quant’s
prop’s that can’t be derived from other prop’s
fundamental unit
each fund quant has an associated fund unit in the International System(SI System) which is used almost worldwide in science
can’t be broken down in2 other units
fund units of length, time, & mass
length - meter m
time - second s
mass - kilogram kg
7 fund units
length
time
mass (how much matter)
temperature
electric current
amount (how many of something)
luminous intensity
base unit of mass
gram g
order of metric ladder
kilo, hecto, deca, base(gram, liter, sec, meter), deci, centi, milli
King Henry Died Monday Drinking Chocolate Milk
can u add measurements with diff properties & units?
no, but u can add measurements of diff units & same properties
unit + unit
unit
unit - unit
unit
unit * unit
unit2

