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What are the 4 Major Stages in the Scientific Method IN ORDER
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What is the difference between accuracy and precision?
Don't know the standard? Can't tell you if it's accurate!
EX: 10.224 g, 10.259 g, 10.235 g
Not precise and cannot tell the accuracy is. Low precision.
What is the equation for an inverse proportion?
P (Pressure) x V (Volume) = K (constant)
How do you use dimensional analysis to arrive at the correct units?
Put labels in the right place to cancel out.
EX: km/hr ...100m/1km - 1km/60 min - 1min/60sec = m and sec are the only labels left
What are the rules for significant zeros? - Which has non-significant zeros?
0.0040 m 400.0 m 404.0 m 40.00 m
0.0040 m - the zeroes before are place holders
Within DIRECT and INVERSE variables. what happens if the other increases?
DIRECT: one increases, the other does too
INVERSE: one increases, the other decreases
What is the correct rule for multiplication and division with significant figures?
Always use the least number in the measurements.
EX: 12m x 4.165m = (only two sig figs.)
NAME THE QUANTITY MEASURED: J
Joules - energy
NAME THE QUANTITY MEASURED: s
Seconds - time
NAME THE QUANTITY MEASURED: g/mL
Grams per milliLiter - density
NAME THE QUANTITY MEASURED: K
Kelvin - temperature
NAME THE QUANTITY MEASURED: L
Liter - volume
NAME THE QUANTITY MEASURED: m
Meters - length
NAME THE QUANTITY MEASURED: m^2
Meters (squared) - area
NAME THE QUANTITY MEASURED: m^3
Meters (cubed) - volume
NAME THE QUANTITY MEASURED: kg
Kilograms - mass
What is the difference between QUANTITATIVE and QUALITATIVE
QUANTITATIVE is using NUMBERS EX: 25g of paper clips QUALITATIVE is using WORDS EX: the sky is blue
Something that has magnitude, size, or amount
a ratio derived from the equality between two different units
combinations of SI base units
WRITE IN SCIENTIFIC NOTATION
5.04 x 10^4
What is the rule with sig. figs?
If it is 5, look at the number before it. Even LEAVE IT! Odd ROUND UP.
EX: 0.0625 = 0.062
DO A CORRECT MEASUREMENT CONVERSION
635 g to kg
635 g x 100 g/ 1kg = 0.635kg
How does THEORY differ from HYPOTHESIS?
THEORY: broad generalization of mass and phenomena
HYPOTHESIS: testable statement
How does WEIGHT differ from MASS?
WEIGHT is a force due to gravity
MASS is the amount of material that makes up an object
How are models used in science?
Give a physical explanation to phenomena
PRACTICING PERCENT ERROR
% error= exp-acc/acc x 100
6.40 - 6.36/6.36 x 100 = 0.6289
0.6289 rounds to 0.6%
WHAT IS THE VOLUME IN LITERS OF A CUBE
One side = 2.25 cm
2.25 x 2.25 x 2.25 = 11.4 cm^3
11.4 cm^3 x 1L/1000cm^3 = 0.0114 L
WHAT IS THE SUM OF 1.026 g and 0.07565?
1.026 + 0.07565 = 1.10165
ROUND ONLY TO THE THIRD DECIMAL due to the number 1.026