Name
KEY
Date
Period
Test Review - Safety, Equipment, Measurement
Safet2
1.
2.
Know the safety rules and location of all the safety devices in the room.
Be able to describe how to use each safety device, including the fire extinguisher ( P A S S ), fire
blanket, eyewash station, safety shower, and safety goggles.
Equipment
3. Recognize a list of basic lab equipment used in class during Unit i labs and the use for each piece.
Measurement Techniques
4. Use doubtful digits and units in recording scientific measurements. Read the following:
a. 1.0
b.
1
2
I
'
I
6.4
C.
I
2
3
4
I
I
I
I
i
4
5
3.25
d,
/
1
1
5
6 ,L'v 7
8
9
I
i
t
I
6
7
8
9
90
I
'_ÿ
2
3
1
t
80
Metric
5. What are the metric base unit symbols symbols for Length ÿ Mass JL, Volume ]i_ ,_a__, and Time _L?
6. What is metric prefix for kilo _k_L? What does kilo mean relative to base units?
7. What is metric prefix for centi _c? What does centi mean relative to base units?
8. What is metric prefix for milli _m? What does milli mean relative to base units?
Significant Figures
9. Identify the number of sig figs in each measurement.
a. 0.00890 m
b. 2.34 x 104 L
c. 300,000,000 m/s
d. 25.030 °C
3056.0 cm
f. 0.006070 °C
g. 1.004 g
h. 1.30520 km
3
e.
3
1
5
10. Complete these problems using correct sig figs in answer.
a. 10.18 m x 0.00740 m =
7.53xt0"2 m2
b. 302,000 mm x 3.5 mm =
1.1xt06 mm2
c. (8.13 x 104m2) + (3.8 x 102m) =
d. 27.54 s - 3.8 s =
2.1x102m
23.7 s
e. (4.6 x 105cm) + (3.2 x 105cm) =
7.Sx105cm
f. 765 g + 37.2 g =
802 g
g. 3.2m + 3.563 s =
9.0x10"i m/s
5
4
4
6
1000x laLÿer
100x smaller
I000x smaller
Accuracy/Precision
11. Define accuracy-
How close a measurement is to the known or true value
Define precision - Both the number of siÿ in measurement and the rNÿeatabitity of file measurement
12. Mike and Steve each measured the length of the same object three times using different rulers.
,.
Mike' s Data
19.9 cm
20.0 cm
19.9 cm
Steve's Data
23.01 cm
22.99 cm
23.01 cm
The true (or actual) length of the object is 19.98 cm.
a. Whose measurements are more accurate? Mike's
b. Whose measurements are precise but NOT accurate? Steve's
Scientific Notation
13. Convert the following to and from scientific notation.
a. 0.0000050830 kg
b. 308,000 s
c. 7004m
5.0830x10-6 k g__
3.08xt06 s
d. 2,651x 104 m
26,5t0 m
e. 8.010 x 10-3 !(ffrl__...O.:,Q.Q,8(.)..[!:..O,._!fl.ÿ
f. 1.1 x 10s mg
7.004x103m
?-
11. Complete the following math problems
//000(5) Jÿ/)r--ÿ
V
I .40x.10-16 !ÿ ÿ
a. (2.92 x 105)x (4.78 x 10 -12) kg
b. (5.23 x 10 aT) x (1.2 x 10 21)
6.3x1038
c. (7.3 x 10 s) x (4.59 x 10 -9)
3.4xi0-3
Conversions
12. Convert scientific measurements using dimensional analysis:
a. Convert 25 mm to m.
im
25 mmx ÿ = 0,025 m or 2.5x10-2 m
I000 mm
100 cm
, -
5
b. Convert 1234 m to cm. 1234 m x ÿ = 123,400 cm or 1.234x10 cm
1m
c. Convert 2.3 km to mm.
1000 #t lO0()mrÿi
2"3kmx-7.kTÿ xÿ--°ÿ=.ÿ.m, 2"3x106mm
d. Covert 4.7 grams of H2 to Liters of H2. (1 mole = 2.016 grams of H2) ( 1 mole = 22.4 Liters)
1 rrtol H2 22.4. L H2
4,7,9H2x- x--- -=52.2222LH2= 52LH2
2,015 .q H2 J. ÿ'ÿtoL H2
25yds 3f't 12trt
°l.h
imin
e. Convert 25 yards/hour to inches/second. --ÿx-{,-ÿ(ÿx--,--xi it: ................ a)min x---'ÿa) x = 0,25 irt/s
Quantitative/Oualitative
13. Differentiate between quantitative and qualitative measurements.
a. Give 3 examples of quantitative measurements. 4 g, 5 L, 6 m
b. Give 3 examples of qualitative measurements. Shaq?, hard, brittle