WorksheetsMidterm Exam Review: Unit 2
Total questions: 37
Worksheet time: 25mins
125 g
mass
volume
distance
temperature
75 °C
mass
volume
distance
temperature
250 mL
mass
volume
temperature
time
cm
centimeter
mL
milliliter
kg
kilogram
Out of the options given, which unit is the largest?
cm
mm
m
km
Calculation!
A = l⋅w
What is the area of a rectangle with a length of 2.4cm and a width of 2.2cm?
5.3 cm2
4.6 cm
1.1 cm
Calculation!
D = m/V
What is the density of a substance with a mass of 134g and volume of 52.2mL?
2.57 g/mL
0.39 g/mL
6,995 gmL
Calculation!
V = l⋅w⋅h
What is the volume of a rectangular solid that has a length of 3.41cm, a width of 5.32cm, and height of 4.25 cm?
77.1 cm3
18.1 cm3
13.0 cm3
Which of the following is a unit of volume?
cm2
cm3
cm
Which of the following units of measurement is NOT metric?
liter
meter
pound
Convert 3.5 gallons into cups. (16 cups = 1 gallon)
Convert 17 inches to centimeters. (1 in = 2.54 cm)
How many feet equal to 9 yards? (1 yd = 3 ft)
35 ft
3 ft
27 ft
How many kilograms is 6.8 pounds? (1 kg = 2.2 pounds)
3.09 kg
14.96 kg
9 kg
How many sig figs?
0.00453
3
5
6
How many sig figs?
11.50
3
4
2
How many sig figs?
125,300
6
5
4
How many sig figs?
0.00450890
4
5
6
When adding and subtracting measurements, the answer should contain ____________________ as indicated by the measured numbers.
the fewest number of decimal places
the fewest number of significant figures
When multiplying and dividing measurements, the answer should contain ____________________ as indicated by the measured numbers.
the fewest number of decimal places
the fewest number of significant figures
Round the following number to 2 sig figs:
0.00106
0.0010
0.0011
0.0016
Round the following number to 3 sig figs:
134,125
134,000
134
134,125
15.28 g + 4.3 g = 19.58 g
How should this answer be reported?
19.58 g
19.6 g
20. g
4.336 cm x 0.75 cm = 3.252 cm2
How should the answer be reported?
3 cm2
3.3 cm2
3.25 cm2
125 m - 22.46 m = 102.54 m
How should this answer be reported?
103 m
102.5 m
102.54 m
6.35 g ÷ 2.11 mL = 3.009478673 g/mL
How should this answer be reported?
3 g/mL
3.0 g/mL
3.01 g/mL
When a set of measurements (multiple measurements) are close to each other
Precision
Accuracy
When a single measurement is close to an accepted value
Precision
Accuracy
% error can be a positive or negative value.
Yes
No
2.34 g, 2.33 g, 2.35 g, 2.34 g
These values show precision.
These values show accuracy.
Experimental Value = 25 °C. Accepted Value = 26 °C
These values show precision.
These values show accuracy.
Calculation!!
If the accepted value of a measurement is 11.4 g and the experimental value of the measurement 11.0 g, what is the % error?
3.51 % error
-85.1 % error
-3.63 % error
What are 2 sources of error in taking measurements?
human error and instrumentation error
physical error and chemical error
alpha error and omega error
A measurement that doe not "fit in" with other measurements of the same type
outlier
inlier
exlier
Calculation!!
If the experimental value of a measurement is 9.5 mL and the accepted value of the measurement 9.0 mL, what is the % error?
-5.6 % error
794% error
5.3 % error
% error is an indication of _____.
precision
accuracy
