Significant Figures
Accuracy/Precision
Ind vs. Dep
Experimental Design
Scientific Notation
100
How many significant figures are in 20 g?
1
100
____________ is a measurement of accuracy.
____________ is a measurement of precision.
Word Bank: Significant Figures, Percent Error
Percent Error = Accuracy
Significant Figures = Precision
100
TRUE or FALSE: The independent variable is manipulated by the experimenter and is graphed on the y-axis.
False
100
A chemistry class is measuring the temperature of the water from each of the lab's faucets and then taking the average temperature of all of the data. What is a possible source of error in this experiment?
A. The number of faucets in the lab
B. The different locations of the faucets in the lab
C. The accuracy of the thermometers used in the lab.
D. The total number of faucets in the lab.
C. The accuracy of the thermometers used in the lab.
100
1.56 x 102
Identify each part. Word Bank: Base, Coefficient, Exponent
1.56 =
10 =
2 =
1.56 = Coefficient
10 = Base
2 = Exponent
200
Which of the following numbers has three significant figures?
A. 200
B. 0.0200
C. 0.020
D. 200.0
B. 0.0200
200
TRUE or FALSE: The dependent variable is the result of the experiment and is graphed on the y-axis.
TRUE
200
Which hypothesis supports the testable question below?
"How does study time impact the grade on a test?"
A. If a student gets a good grade on a test, then they must have cheated.
B. If a student studies for longer, then their test grade will increase.
C. If a student studies, then they deserve the score they get.
D. If a student gets a bad test score, then they didn't study.
B. If a student studies for longer, then their test grade will increase.
300
All of the following numbers have four significant figures, except -
A. 4.520
B. 0.4520
C. 4,000
D. 4,520.
C. 4,000
300
A class is trying to find the boiling point of water. It is known that the boiling point of water is 100oC. Which group is accurate, but not precise?
Group 1
300
What piece of lab equipment is used to measure the volume of a liquid?
Graduated Cylinder
400
Arthur is combining chemicals for a reaction. He combines 0.875g of NaCl, 0.25g of H2O, and 0.5g of NaHCO3. What is the total mass of the chemicals, rounded using significant figure rules?
1.6g
400
What is 0.000214 written in scientific notation with two significant figures?
A. 2.1 x 10-4
B. 2.14 x 10-3
C. 2.1 x 103
D. 2.14 x 104
A. 2.1 x 10-4
500
Henry is trying to find the volume of a marshmallow, but he can't use water displacement, or the marshmallow will dissolve. He knows the density of marshmallow is 0.24 g/mL. The mass of the marshmallow is 7.5g. What is the volume of the marshmallow, rounded using significant figure rules?
31 mL
500
A student measured that the mass of an object is 4.75g. The teacher stated that the actual mass of the object is 3.25g. What is the student's percent error?
46%
500
Write 4,567,890 in scientific notation with three significant figures.
4.56 x 106