What are the 4 Major Stages in the Scientific Method IN ORDER
Observing
Formulating Hypothesis
Testing
Theorizing
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
QUANTITY
Something that has magnitude, size, or amount
CONVERSION FACTOR
a ratio derived from the equality between two different units
DERIVED UNITS
combinations of SI base units
WRITE IN SCIENTIFIC NOTATION
50,400 m
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
Experimental: 6.40
Accepted 6.36
% 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
1.102
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