Chemistry Cp Worksheet
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1
2
3CHEMISTRY CP
Name:________________________________ Per. ____
REVIEW FOR UNIT 1 TEST
Introductory Material: Scientific Method, Scientific Notation, Density
1. You will need to know the Metric Conversion Chart for this test. As a sample problem, give the numerical value
for each of the prefixes.
A. Mega
E. deci
B. Kilo
F. centi
C. Hecto
G. milli
D. Deka
2. Metric Conversions: Give the value of the following in the units indicated.
a. 6.92 mm = __________________ m
f. 934 cm = __________________Hm
b. 8 Kg = _____________________dg
g. .55 L = ____________________ mL
c. 35 dam = __________________ Km
h. 6.45 kg = __________________ mg
d. 690 ml = ___________________ L
i.
75 mg = _____________________ g
e. .068 m = __________________ mm
3. Be able to recognize which step of the scientific method is being described from different examples. Remember
the basic steps are the following:
a) observation, b) hypothesis, c) experimentation or testing, d) collecting or recording data, e) drawing
conclusions.
As an example, which step of the scientific method would each of the following be?
(1) After years of testing and analyzing data a scientist determines that chemicals in a city’s drinking water
are causing an increase in the intelligence of children in the city.
(2) A biology student notices many frog tadpoles in a particular pond have two tails.
(3) The biology student prepares tables and graphs of all the information she has collected.
(4) The biology student guesses that waste water from a sewage treatment plant which empties into the pond
is causing the two tailed tadpoles.
(5) The biology student obtains some freshly laid frog eggs and keeps some in the pond water and others in
distilled water while waiting for them to hatch.
Problems: Calculate the following using correct units and significant digits.
3
4. A metal has a volume of 4.2 cm
and a mass of 16.0 g. What is its density?
3
5. An object has a mass of 75 g and a volume of 80.0 cm
. What is its density?
3
6. An object has a density of 4.5 g/cm
and a mass of 20.6 g. What is its volume?
7. Do the following multiplication and division problems and round off to the proper number of significant
digits in the final answer.
A. 342÷16
B. 2300÷110
C. (23.002) (.0560)
D. (84.00) (9001)
Perform the following operations and express your answer in proper scientific notation with the proper
number of significant digits and proper units.
3
-4
8. (4.1×10
cm) (3.6×10
cm)
-4
9. 1.6×10
g
-2
3
8×10
dm
-4
-2
10. (6.1×10
Kg) (4.4×10
m)
3
-5
(4.2×10
s) (2.79×10
s)
6
3
11. 7.0×10
m
5
1.5×10
m
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