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Chemistry Unit 1 Test Review - Basics of Science and Numbers in Chemistry

Total questions: 80

Worksheet time: 20hrs 0mins

Name
Class
Date
1.

What tool would you use to measure the volume of a cube?

a)

Beaker

b)

Ruler

c)

Spring scale

d)

Triple beam balance

2.

A graduated cylinder if filled with 40 mL of water. A lego is dropped into the cylinder and the volume is now 47 mL. What is the volume of the rock found through displacement?

a)

7g

b)

7mL

c)

7 g/mL

d)

7 g/cm3

3.

How would you record this measurement to the correct number of significant figures?

a)

3.0 cm

b)

3.2 cm

c)

3.25 cm

d)

3.250 cm

4.

How many significant figures are in a measurement of 63.507 g

a)

2

b)

3

c)

4

d)

5

5.

How many significant figures are in a measurement of 0.074 L?

a)

4

b)

3

c)

2

d)

0

6.

What is 3.354 x 3.45 recorded to the correct number of significant figures?

a)

11.5

b)

11.57

c)

11.571

d)

11.6

7.

A metal has a volume of 82.5 cm3 and a density of 2.71 g/cm3. What is its mass?

a)

0.0328 g

b)

30.4 g

c)

85.2 g

d)

224 g

8.

Which of these substances would sink to the bottom of a graduated cylinder if I mixed them all together?

a)

water (density: 1.0 g/mL)

b)

gasoline (density: 0.7 g/mL)

c)

mercury (density: 13.6 g/mL)

d)

milk (density: 1.06 g/mL)

9.

Using the rules for sig figs, what is the answer to this math: 12.431 + 23.10 + 1.2 =

a)

36.5

b)

37

c)

36

d)

36.7

10.

How would you express 185 000 in proper scientific notation?

a)

1.85 x 105

b)

1.85 x 10-5

11.

Zeros in a measurement are ALWAYS significant when

a)

they are leading zeros.

b)

they are trailing zeros.

c)

they are captive zeros.

12.

What is an example of a unit that measures mass?

a)

m

b)

L

c)

s

d)

kg

13.

How would you round 5678 to 2 sig figs?

a)

56

b)

57

c)

5700

d)

5700.

14.

Convert 988200 cm into km.

a)

98.82 km

b)

9.882 km

c)

0.9882 km

d)

988.2 km

15.

The unit mL is used to measure what quantity?

a)

mass

b)

volume

c)

length

d)

density

16.
If an unknown substance has an accepted density of 2.50 g/mL and an experimental density of 2.321 g/mL, what is the percent error?
a)
0.0716%
b)
0.072%
c)
7.16%
d)
7.2%
17.
How many significant figures are in 0.03320 m?
a)
3
b)
2
c)
4
d)
6
18.
If a group of measurements are all close to the accepted value, the measurements are __________.
a)
accurate
b)
precise
c)
accurate and precise
d)
neither accurate nor precise
19.
Which word describes how close a group of measurements are to each other?
a)
accuracy
b)
precision
c)
percent error
d)
when a dart is thrown at a target
20.
A block has a mass of 12 g and a density of 5 g/mL.  What is the volume?
a)
6 mL
b)
2.4 mL
c)
2 mL
d)
2.5 mL
21.
If the density of milk is 1.03 g/mL, gasoline is 0.70 g/mL, and aluminum is 2.7 g/mL, which substance would be at the bottom of the container if mixed?
a)
milk
b)
gasoline
c)
none of these
d)
aluminum
22.

SI base unit for mass:

a)

gram

b)

kilogram

c)

pound

d)

newton

23.

In the density triangle, which variable goes on top (of the triangle)?

a)

volume

b)

density

c)

mass

d)

area

24.

How many significant digits: 100. g

a)

1

b)

2

c)

3

d)

4

25.

How many sig figs allowed in the answer...Volume of a box with a length of 10 meters, width 456 meters, height 35 meters?

a)

1

b)

2

c)

3

d)

4

26.

Standard notation of 7.8 x 10-2

a)

.078

b)

.0780

c)

78

d)

780

27.

25 mL = ________ cm3

a)

25000

b)

2500

c)

250

d)

25

28.

Write 7.113 x 107 in standard form.

a)

71,130,000

b)

7,113,000

c)

0.0000007113

d)

7,113

29.
Which of the following is correct scientific notation?
a)
20.35 x 104
b)
.2035 x 104
c)
2035 4
d)
2.035 x104
30.

Is 20 g greater than, less than, or equal to 2 kg?

a)

greater than

b)

less than

c)

equal to

31.

The moon is 250,000 miles (mi) away. How many kilometers (km) is this from Earth?

Conversions:

5280 ft = 1 mi

12 in = 1 ft

2.54 cm = 1 in

1 km = 100,000 cm

a)

402336 km

b)

0.01443 km

c)

0.000100 km

32.

Convert 273 K to oC

K = oC + 273

a)

0oC

b)

100oC

c)

-273oC

d)

50oC

33.

Convert -89 oC to K

K = oC + 273

a)

184K

b)

362K

c)

-362K

d)

-184K

34.
Which lab tool might you use to measure the volume of a liquid?
a)
electric scale
b)
bunsen burner
c)
test tube
d)
graduated cylinder
35.

Convert 15°C to Fahrenheit

a)

63.8°F

b)

84.6°F

c)

-9.4°F

d)

59°F

36.
You know 16 cups = 1 gallon. Convert 3.5 gallons into cups.
a)
56 cups
b)
0.21875 cups
c)
19.5 cups
d)
48 cups
37.

When converting between SI prefixes, what should you do if you are moving from smaller to larger units?

a)

move the decimal to the left

b)

move the decimal to the right

c)

do not move the decimal

d)

use dimensional analysis

38.

What will happen if you forget to put units on your answer on the test Monday?

a)

I will get full credit

b)

I will lose points

39.

What will happen if you do not show your work on the test Monday for problems that are not multiple choice?

a)

I will get full credit

b)

I will lose points

40.
What prefix is represented by the following symbol:  k
a)
hecto
b)
kilo
c)
deci
d)
deka
41.
98 dm = ________mm
a)
98
b)
0.98
c)
980
d)
9800
42.
What does this measure?
a)
mass
b)
volume
c)
distance
d)
weight
43.
The metric abbreviation for millimeter is
a)
cm
b)
mm
c)
dm
d)
m
44.

The metric system is based upon the power of what number?

a)

12

b)

10

c)

16

d)

8

45.
Which lists metric units, in order, from smallest to largest?
a)
milligram, centigram, gram
b)
kilogram, gram, centigram
c)
decagram, hectogram, milligram
d)
kilogram, hectogram, decagram
46.
275 kL =  ___  dL
a)
2,750,000
b)
2.75
c)
27,500
d)
2,750,000,000
47.
The scientific instrument used to measure mass.
a)
bathroom scale
b)
meter stick
c)
spring scale
d)
triple-beam balance
48.

Absolute zero

a)

indicates the complete absence of heat/energy

b)

is the coldest possible temperature

c)

is when all molecular motion stops

d)

All of the above

49.

Convert 99.6°F to Celsius (5/9 x (0F - 32))

a)

37.6°C

b)

37.5°C

c)

73.1°C

d)

375°C

50.

Convert 30°C to Fahrenheit (1.8 x 0C) + 32

a)

860°F

b)

86°F

c)

63.8°F

d)

56°F

51.
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
52.
If you spill or break something during an experiment, what is the FIRST thing you should do?
a)
Tell the teacher.
b)
Clean it up. 
c)
Cover it with a paper towel.
d)
Leave it for someone else.
53.
The lab equipment seen in the image should be worn during a lab investigation when...
a)
using glassware.
b)
using chemicals.
c)
using heat/fire.
d)
using any of the above.
54.
Identify the piece of lab equipment seen in the image.
a)
Erlenmeyer Flask
b)
Graduated Cylinder
c)
Beaker
d)
Test Tube
55.
Identify the primary function of the lab equipment seen in the image.
a)
Transfer small amounts of liquid
b)
Transfer large amounts of liquid
c)
Measure liquid volume
d)
Mixing liquid chemicals
56.
To be read accurately, one must place a graduated cylinder on a flat surface and measure at the bottom of the _______________ curve.
a)
Centrifugal
b)
Capillary
c)
Meniscus
d)
Infinity
57.
Your sleeve catches on fire. What safety equipment should you use to help put it out?
a)
Fire extinguisher
b)
Eye washing station
c)
Fire blanket
d)
First aid kit
58.
Approved eye protection devices (such as goggles) are worn in the laboratory
a)
to improve vision
b)
only if you don't wear glasses
c)
anytime heat, chemicals, or glassware are used
d)
to avoid eye strain
59.
You have been injured in the laboratory (cut, burn, etc.). First you should
a)
visit school nurse
b)
text your parent
c)
see a doctor after school
d)
tell instructor immediatly
60.
Which is NOT a step in the scientific method?
a)
Make observation
b)
Form a theory
c)
Collect data
d)
Form a hypothesis
61.
This variable in an experiment is the one being changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
62.
The summary at the end of an experiment that explains the results. 
a)
conclusion
b)
procedures
c)
materials
d)
hypothesis
63.
What is the best way to make sure a measurement is accurate (correct)?
a)
make a good estimate
b)
have someone else measure for you
c)
take the measurement several times
d)
compare your guess with your measurement
64.
Fooling around in the lab, throwing things, and doing unauthorized experiments are all:
a)
Not dangerous
b)
Great if you have time
c)
Always against the rules
d)
Ok every other Tuesday
65.
If a chemical is splashed in your eyes, you should ..
a)
rub your eyes with your hands
b)
wipe your eyes with a paper towel
c)
flush your eyes with running water
d)
close your eyes tight until the feel better
66.
Identify the equipment shown here:
a)
wire gauze
b)
flame spreader
c)
sieve
d)
mesh
67.
Identify the equipment shown here:
a)
beaker holder
b)
iron ring
c)
forceps
d)
test tube holder
68.
Identify the equipment shown here:
a)
crucible holder
b)
wire gauze
c)
clay triangle
d)
test tube holder
69.
This item is used to simply hold or approximately measure a liquid.
a)
beaker
b)
flask
c)
graduated cylinder
d)
test tube
70.
Identify the equipment shown here:
a)
test tube holder
b)
iron rod
c)
iron ring
d)
ring stand
71.

Which piece of lab equipment would be used to pick up small chemical pellets that should not come in contact with the skin?

a)

forceps

b)

pipette

c)

probe

d)

tongs

72.
What is used to pour liquids into containers with small openings or to hold filter paper?
a)
ring stand
b)
lab coat
c)
beaker
d)
funnel
73.

Where does broken glass go when working in the lab?

a)

In the broken glass container

b)

In the garbage

c)

In the recycling

d)

It stays on the floor

74.
Which side of a penny will hold more drops of water? Choose the best hypothesis.
a)
If I use the heads side of a penny, then it will hold more drops of water than tails.
b)
Heads
c)
Tails
d)
Tails will hold more drops of water.
75.
On what axis should the independent variable always be?
a)
X
b)
Y
76.
During this step of the scientific method, a scientist would gather background information. 
a)
Hypothesis
b)
Research
c)
Observation
d)
Experiment 
77.
Which one is an example of Qualitative Data?
a)
25 Pounds
b)
30 Seconds 
c)
2 Meters
d)
Soft
78.

If I listen to Mrs. Hilton's instructions, then I will have less accidents in the lab. What is the independent variable?

a)

Yes

b)

Maybe

c)

Listening or not listening to instructions

d)

Likelihood of having an accident in lab

79.
Explaining the color of a chemical would be what kind of observation?
a)
Qualitative 
b)
Quanitative
80.
You will want your experiment to have ____ independent variable(s) in it for the experiment to be valid.
a)
1
b)
2
c)
3
d)
4

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