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Lab Safety and Measurements

Total questions: 45

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

The directions for a lab state that googles need to be worn. What should you do?

a)

Wear your goggles the entire time

b)

Wear your goggle part of the time

c)

Use the goggles to pull back your hair

2.

Which of the following is NOT something you do after a lab is completed?

a)

Wash your hands

b)

Dispose of trash

c)

Read the directions

d)

Clean your materials off the lab table

3.

If you want to measure volume of a liquid, which tool would be best to use

a)

A flask

b)

A test tube

c)

A graduated cylinder

4.

What should you do if you break glass in the lab?

a)

Tell the teacher.

b)

Sweep up the glass.

c)

Pick up the glass with your hands.

d)

Ignore it; the teacher will clean it up when she sees it later.

5.

°C = (°F-32) x (5/9)

°F = (9/5) x °C + 32

Celsius = Kelvin - 273

Kelvin = Celsius + 273


Convert the temperature:

25 C = _______ F

a)

77 °F

b)

32 °F

c)

28 °F

6.
When should you tie back long hair or baggy clothing?
a)
When working with chemicals
b)
When working with a Bunsen burner
c)
When doing dissections.
d)
Any time you are working in the lab.
7.
Horseplay, jokes, and pranks are appropriate in the science classroom at any time.
a)
True
b)
False
8.
When working in the lab, you always...
a)
work with only members of your group with a business-like attitude
b)
ask questions when in doubt about procedures
c)
clean up after yourself 
d)
all of the above
9.

°C = (°F-32) x (5/9)

°F = (9/5) x °C + 32

Celsius = Kelvin - 273

Kelvin = Celsius + 273


Convert the temperature:

97 °C = _______ °F

a)

97.3 °F

b)

10.2 °F

c)

206.6 °F

10.
Convert: -194 C to F:
a)
-317.2 F
b)
338.5 K
c)
- 273 C
d)
0 K
11.
Convert: 253 C to K:
a)
526 K
b)
625 K
c)
0 K
d)
186 K
12.
What does PASS stand for?
a)
Pull, Aim, Spray, Sweep
b)
Pull, Aim, Squeeze, Sweep
c)
Pull, Aim, Squeeze, Spray
d)
Press, Aim, Spray, Sweep
13.

Convert: 186.5 K to °C 

a)

-86.5 °C

b)

-50 °C

c)

-68.4 °C

d)

180 K

14.

Never work without...

a)

good music

b)

a buddy

c)

adult supervision

d)

a snack

15.

Emergency equipment in our classroom includes:

a)

eyewash fountain

b)

safety shower

c)

fire extinguisher

d)

fire blanket

16.

At the end of each lab...

a)

put away all equipment and chemicals

b)

notify the teacher of any spills or damaged equipment

c)

wash your hands

d)

announce, "I have completed the task!"

17.

°C = (°F-32) x (5/9)

°F = (9/5) x °C + 32

Celsius = Kelvin - 273

Kelvin = Celsius + 273


Convert the temperature:

-40 °C = _______ °F

a)

-40 °F

b)

32 °F

c)

0 °F

18.
What piece of equipment (tool) is used to measure length?
a)
Graduated Cylinder
b)
Meter Stick
c)
Triple-Beam Balance
19.
Which piece of equipment is shown in the picture?
a)
Graduated Cylinder
b)
Meter Stick
c)
Triple-Beam Balance
d)
Beaker
20.
What is the reading of the meniscus?
a)
36mL
b)
45mL
c)
35.0mL
d)
30.5mL
21.

Precision is

a)

Measurements that are close together

b)

Measurements that are close to the true value

c)

How close measurements are to the true value

d)

how consistent multiple measurements are to each other

22.

What is the AVERAGE of the following numbers?

16, 74, 29, 33, 45, 25

a)

36

b)

37

c)

38

d)

39

23.
The SI unit for temperature is __?__.
a)
degree fahrenheit  (° F)
b)
degree celsius  (° C)
c)
kelvin  (K)
d)
degree centigrade  (°C)
24.

?

a)

Accurate & Precise

b)

Accurate but not Precise

c)

Precise but not Accurate

d)

Not Accuracy or Precision

25.

The SI unit for time is the __?__.

a)

hours (h)

b)

liter (L)

c)

gram (g)

d)

second (s)

26.

The SI unit for mass is _________.

a)

Pounds

b)

Inches

c)

Kilograms

d)

Ounces

27.

What is the proper SI unit for volume?

a)

cm3

b)

m

c)

g

d)

L

28.

This bullseye demonstrates...

a)

Accurate & Precise

b)

Accurate but not Precise

c)

Precise but not Accurate

d)

Not Accurate or Precise

29.
Describe the accuracy and precision of the image
a)
Accurate and Precise
b)
Accurate and not precise
c)
Not Accurate and Precise
d)
not accurate and not precise
30.

John's electric bill was $197 in July, $205 in August, $228 in September, and $150 in October. What was John's average electric bill for those months?

a)

$193

b)

$194

c)

$195

d)

$196

31.
Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have.
1, 0, 1, 5, 6, 3, 4
a)
3.33
b)
2.85
c)
3
d)
3.5
32.

Accuracy is

a)

Measurements that are close together

b)

Measurements that are close to the true value

c)

How correct the measurement is

d)

How close together measurements are to each other

33.
What is used to hold test tubes?
a)
Test tube rack
b)
Magnifying glass
c)
Petri dish
d)
Funnel
34.
If a laboratory fire erupts, immediately
a)
notify your teacher
b)
run for the fire extinguisher
c)
throw water on the fire
d)
open a window
35.
The proper technique for smelling chemicals is ______________
a)
keeping your nose close to the glassware
b)
wafting
c)
to sniff only a small amount
d)
Trick question; you never are allowed to smell chemicals in class
36.
Chipped or cracked glassware is okay to use.
a)
True
b)
False
37.
The following activity is allowed in the science laboratory
a)
Eating
b)
Drinking
c)
Chewing Gum
d)
None of these are allowed
38.

Which of the following is inappropriate to wear in the lab?

a)

Loose clothes

b)

All of these

c)

Loose jewelry/lanyard

d)

Sandals

39.
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
40.

You are conducting a lab and your lab partner's hair catches on fire. What do you use to put it out?

a)

Safety shower

b)

Your fist

c)

Fire blanket

d)

Fire extinguisher

41.

What should you do when you enter the classroom?

a)

Talk to your friends

b)

Answer the bell ringer

c)

Get out the materials needed

d)

Sit quietly at your desk

42.
What temperature does the thermometer show?
a)
16 °
b)
12 °
c)
13 °
d)
14 °
43.

Convert 89 °\degree F into  °\degree C 

(a)  

44.
Which thermometers temperature is about  25° Celcius?
a)
Blue
b)
Green
c)
Blue
d)
Blue and Green
45.

Which of the follow represents a normal body temperature of 98.6 °F in Celsius?

a)

37°C

b)

370°C

c)

72.5°C

d)

72.6°C

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