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WorksheetsIntroduction to Chemistry
Total questions: 50
Worksheet time: 33mins
Name
Class
Date
1.
The state of matter in which a material has neither a definite shape nor a definite volume is the state ________.
a)
gaseous
b)
liquid
c)
elemental
d)
solid
2.
Which of the following is an example of a chemical change?
a)
freezing water to make ice
b)
boiling water to make steam
c)
making salt water from salt and water.
d)
separating water into hydrogen and oxygen.
3.
Which of the following is NOT an indicator that a chemical change has occurred?
a)
color change
b)
change in mass
c)
formation ofprecipitate
d)
increase or decrease of temperature
4.
Kaitlyn is blending together ingredients to create different mixtures. Which combination of substances would most likely result in a homogeneous mixture?
a)
sand and gravel
b)
sand and salt
c)
gravel and water
d)
salt and water
5.
How many significant figures does 0.3345 have?
a)
2
b)
3
c)
4
d)
5
6.
Round off 478.92 to 4 significant figures?
a)
478.9
b)
478
c)
478.0
d)
480
7.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5
8.
How many significant figures does the following number have: 100.00210
a)
7
b)
5
c)
10
d)
8
9.
How many significant figures does 1.90 × 10^8 have?
a)
3
b)
4
c)
6
d)
8
10.
Round 0.010229 to four sig figs
a)
1022
b)
1023
c)
0.01023
d)
0.01022
11.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
12.
Calculate 5.50 cm + 5.50 cm
a)
11 cm
b)
11.0 cm
c)
11.00 cm
d)
11.000 cm
13.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
14.
Solve & Round to Correct Sig Figs.
100 / 2 =
100 / 2 =
a)
50
b)
50.
c)
50.0
d)
50.00
15.
Solve & Round to Correct Sig Figs.
4.5 x 2.34 =
4.5 x 2.34 =
a)
11
b)
10.52
c)
10.5
d)
10
16.
Calculate 12.34 × 1.234 × 0.1234
a)
1.87908
b)
1.879
c)
1.9
d)
1.8790809
17.
If a laboratory fire erupts, immediately
a)
notify your instructor
b)
run for the fire extinguisher
c)
throw water on the fire
d)
open the windows
18.
Approved eye protection devices (such as goggles) are worn in the laboratory
a)
to avoid eye strain
b)
to improve your vision
c)
only if you don’t have corrective glasses
d)
any time chemicals, heat or glassware are used
19.
If you do not understand a direction or part of a lab procedure, you should
a)
skip it and go on to the next part.
b)
ask the instructor before proceeding
c)
try several methods until something works
d)
figure it out as you do the lab
20.
You are heating a piece of glass and now want to pick it up. You should
a)
pour cold water on it
b)
use tongs
c)
pick up the end that looks cooler
d)
use a rag or paper towels
21.
You have been injured in the laboratory (cut, burn, etc.). First you should
a)
apply first aid yourself
b)
tell the science instructor at once
c)
see a doctor after school
d)
visit the school nurse after class
22.
In a laboratory, the following should not be worn.
a)
all of the answers
b)
dangling jewelry
c)
sandals
d)
loose clothing
23.
The following footwear is best in the laboratory.
a)
shoes appropriate for the weather
b)
open-toed shoes
c)
closed-toed shoes
d)
sandals
24.
Horseplay or practical jokes in the laboratory are
a)
okay if you are working alone
b)
not dangerous
c)
okay
d)
always against the rules
25.
Part of lab safety includes reading the lab procedure...
a)
before doing the lab
b)
while doing the lab
c)
after doing the lab
d)
only if you think you really need it
26.
Accuracy is defined as
a)
close repeated measurements
b)
awesome measurements
c)
really good guessing
d)
measurement near the true value
27.
Measurements that are repeated and close to each other can be defined as:
a)
accurate
b)
accurate and precise
c)
precise
d)
estimated
28.
How many meters are in 10 kilometers?
a)
1
b)
10
c)
10000
d)
1000
29.
a)
beaker
b)
flask
c)
graduated cylinder
d)
test tube
30.
a)
hot plate
b)
flame thrower
c)
heater
d)
bunsen burner
31.
a)
Erlenmeyer flask
b)
Volumetric flask
c)
beaker
d)
graduated flask
32.
a)
glass triangle
b)
funnel
c)
stirring rod
d)
buret
33.
a)
buret
b)
erlenmeyer flask
c)
graduated cylinder
d)
beaker
34.
a)
ignition tubes
b)
test tubes
c)
graduated cylinders
d)
burets
35.
a)
test tube rack
b)
test tube holder
c)
wire holder
d)
utility clamp
36.
a)
wire mesh
b)
wire gauze
c)
wire fence
d)
hot mitt
37.
What is measured with a graduated cylinder?
a)
Passage of time
b)
Distance from one thing to another
c)
Weight of an object
d)
Volume of liquid
38.
a)
Evaporating dish
b)
Watchglass
c)
Glass dish
d)
Lens
39.
The amount of matter in an object is__________?
a)
weight
b)
mass
c)
volume
d)
density
40.
Matter includes all of the following except
a)
air
b)
smoke
c)
light
d)
water vapor
41.
All of the following are examples of units except
a)
weight
b)
gram
c)
kilometer
d)
teaspoon
42.
The study of matter and changes that occur in matter best describes the science of
a)
Biology
b)
Physics
c)
Chemsitry
d)
Psycology
43.
2.54 _____ = 1 in.
a)
m
b)
mm
c)
cm
d)
cc
44.
1 mL = 1 _____
a)
in.
b)
cm
c)
cm3
d)
L
45.
The base unit for mass is the
a)
cubic centimeter
b)
gram
c)
meter
d)
centigram
46.
A possible explanation to a problem that has not yet been tested.
a)
data
b)
theory
c)
hypothesis
d)
fact
47.
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
48.
Which is NOT a step in the scientific method?
a)
Make observation
b)
Form a theory
c)
Collect data
d)
Form a hypothesis
49.
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
50.
The summary at the end of an experiment that explains the results.
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
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