What is a quantity that has both a number and a unit?
Measurement
100
What is the difference between experimental value?
Error
100
What are the SI units?
Revised version of the metric system
100
What is a ration of equivalent measurements called?
Conversion Factor
100
What is the formula to calculate density?
Mass/Volume
200
What is a number that is written as a coefficient and 10 raised to a power said to be expressed in?
Scientific Notation
200
How do you calculate error?
Error = experimental value - accepted value
200
What is the SI unit for length?
Meter
200
What is a way to analyze and solve problems using the units or dimensions of a measurement?
Dimensional Analysis
200
The density of a substance generally ________ as its temperature increases.
Decreases
300
Measurements must always be reported to the correct number of __________ because calculated answers often depend on the number of _________ in the answer.
(hint: a measurement that includes all of the digits that are known, plus a last digits that is estimated.)
Significant Figures
300
What is the correct value based on reliable references?
Accepted Value
300
What is the SI unit for the amount of substance?
Mole
300
True or False: When a measurement is multiplied by a conversion factor, the numerical value is changed.
False
300
True or False: Density is an intensive property that depends only on the composition of a substance, not on the size of the sample.
True
400
What is the difference between accuracy and precision?
Accuracy is the measure of how close a measurement comes to the actual or true value, while precision is the measure of how close a series of numbers are to one another.
400
What is the value measured in the lab?
Experimental Value
400
What is the freezing point on the Kelvin scale?
-273K
400
Express 750 dg in grams
750 * 1g/10dg = 75dg
400
A 10.0 cm^3 piece of lead has a mass of 114g.What is the density of the lead?
114g/10.0 cm^3 = 11.4g
500
2.10 m * 0.70 m
(Use correct sig figs)
1.5^2 m
500
How do you calculate percent error?
Percent error = (|error|)/ Accepted Value * 100
500
4.184 Joules = ?
1 Calorie
500
What is 0.073 cm in micrometers?
7.3 * 10^2 um
500
A penny has a mass of 3.1 g and a volume of 0.35 cm^3. What is the density of the penny?