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Unit 1 Review
Test Description: Accuracy Precision Sig Fig Density Sci Not Metric
Instructions: Answer all questions to get your test result.
1) How close your data is to the intended target is -
A
Precision
B
Accuracy
C
Error
D
Density
2) How close the data sets are to one another is -
A
Density
B
Error
C
Precision
D
Accuracy
3) Where do you read the meniscus?
A
At the top
B
Slightly below to account for cohesion and adhesion
C
In the middle
D
At the bottom
4) How do you round your final answer when adding or subtracting measurements
A
Round your answer to have the same precision as the least precise measurement
B
Round to the same number of sig figs as the measurement with the least amount of sig figs.
C
Round your answer to two places after the decimal point
D
Round to the same number of sig figs as the first measurement you made
5) How many sig figs are in this number: 10.002
A
3
B
2
C
5
D
4
6) How many sig figs are in this number: 523
A
0
B
1
C
3
D
2
7) How many sig figs are in this number: 61000
A
3
B
5
C
4
D
2
8) Round 21.860051 to 3 significant figures.
A
22.0
B
21.9
C
21.860
D
21.8
9) Perform the operation and round to the correct number of significant figures: 6.201cm + 7.4cm + 0.68cm + 12.0cm
A
26cm
B
26.3cm
C
26.2cm
D
26.30cm
10) Perform the operation and round to the correct number of significant figures: (22.16 + 21.30) / 1.251
A
34.7
B
34.741
C
35
D
34.74
11) A student measured the mass of some sodium chloride for a lab. The lab called for 6.25 g (the theoretical measurement), but the student measured 6.00 g instead. What is the percent error for this mass?
A
4%
B
-4%
C
4.0%
D
-4.0%
12) A piece of metal is placed on the balance and the mass was found to be 23.1g and the volume is found to be 2.72mL. What is the density?
A
2.5g/mL
B
2.49g/mL
C
2g/mL
D
2.492g/mL
13) 5.1cm = ? hm
A
51000hm
B
5100hm
C
0.00051hm
D
0.0051hm
14) 2.23kg = ? mg
A
0.0000023 mg
B
223000 mg
C
0.000023 mg
D
2230000 mg
*select an answer for all questions
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