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WorksheetsChemistry CP chapter 2.1
Total questions: 25
Worksheet time: 39mins
Name
Class
Date
1.
A possible explanation to a problem that has not yet been tested.
a)
data
b)
theory
c)
hypothesis
d)
fact
2.
This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted.
a)
experimental group
b)
control group
c)
data
d)
variables
3.
This variable in an experiment is the one being deliberately changed by the scientist.
a)
dependent variable
b)
independent variable
c)
data
d)
control group
4.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
5.
On what axis should the independent variable always be?
a)
X
b)
Y
6.
The chart below summarizes the effect of commercial fishing on a local Atlantic cod population over an 9-year period.
a)
the number of fishing boats has less effect on the local cod population than pollution
b)
more fishing boats make the cod population estimates more accurate
c)
an increase in fishing boats has had a positive impact on cod population growth
d)
commercial fishing is having a negative effect on the local cod population
7.
A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?
a)
heart rate
b)
type of exercise
c)
amount of exercise
d)
time of day exercise occurs
8.
Which of the following is an example of quantitative data?
a)
the color of the fur of an animal
b)
the mating behavior of an animal
c)
the average number of offspring that an organism has
d)
the description of an odor that a chemical produces
9.
There are two types of data. Which type of data involves descriptions that cannot be counted or measured?
a)
qualitative
b)
quantitative
10.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
11.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5
12.
How many significant figures does the following number have: 100.00210
a)
7
b)
5
c)
10
d)
8
13.
How many significant figures does the following number have: 56.040
a)
2
b)
3
c)
4
d)
5
14.
What is 98.907 rounded to 1 significant figure?
a)
98.9
b)
90
c)
100
d)
98.91
15.
Calculate 5.50 cm + 5.50 cm and give your answer with the appropriate number of significant figures.
a)
11 cm
b)
11.0 cm
c)
11.00 cm
d)
11.000 cm
16.
Calculate 12.34 + 1.234 + 0.1234 and give your answer with the appropriate number of significant figures.
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
17.
Calculate 345.009 g - 23.009 g and give your answer with the appropriate number of significant figures.
a)
322.00 g
b)
322 g
c)
322.000 g
d)
322
18.
Calculate 7.987 m - 0.54 m and give your answer with the appropriate number of significant figures.
a)
7.45 m
b)
7.447 m
c)
7.4 m
d)
7.5 m
19.
Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.
a)
1.0 m2
b)
1.1 m2
c)
1.0947 m2
d)
1.09 m2
20.
Calculate 123000 m x 3234 m and give your answer with the appropriate number of significant figures.
a)
3.97 x 10-7 m2
b)
39800000 m2
c)
398 m2
d)
3.98 x 108 m2
21.
Calculate 923 g ÷ 20312 cm3 and give your answer with the appropriate number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
4 x 10-2 g/cm3
22.
Calculate 12.47 m ÷ 3.2 s and give your answer with the appropriate number of significant figures.
a)
4 m/s
b)
3.9 m/s
c)
3.90 m/s
d)
3.897 m/s
23.
1345.567 / 23.56 = ? (Use significant figures!)
a)
57.11
b)
58.11
c)
56.75
d)
83.49
24.
Solve & Round to Correct Sig Figs.
100 / 2 =
100 / 2 =
a)
50
b)
50.
c)
50.0
d)
50.00
25.
Todd's measurements:
11.2 cm, 11.3 cm, 11.0 cm
Actual Value: 10.5 cm
Todd's measurements are
11.2 cm, 11.3 cm, 11.0 cm
Actual Value: 10.5 cm
Todd's measurements are
a)
accurate and precise
b)
accurate
c)
precise
d)
neither
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