Transcript Science Safety

Science Safety
Guidelines for Safety in the Science Classroom
Lab Safety

Be Responsible

Follow all written and verbal instructions
carefully. If you do not understand a direction or
part of a procedure, ASK the teacher!!

No student may work in the laboratory without
an instructor present.

Do not eat food, drink beverages, or chew gum
in the laboratory. Do not use laboratory
glassware as containers for food or beverages.

Perform only those experiments authorized by
the instructor.
General Rules

Be prepared for your work in the laboratory.

Horseplay, practical jokes, and pranks are
dangerous and prohibited.

Work areas should be kept clean and tidy at all
times.

Know the locations and operating procedures of
all safety equipment including the first aid kit,
eyewash station, safety shower, fire extinguisher,
and fire blanket. Know where the fire alarm and
the exits are located.
General Rules

Be alert and proceed with caution at all times in the
laboratory.

Dispose of all chemical waste properly.

Keep hands away from face, eyes, mouth and body while
using chemicals or preserved specimens. Wash your hands
with soap and water after performing all experiments.

Experiments must be personally monitored at all times.

Students are never permitted in the science storage rooms
or preparation areas unless given specific permission by
their instructor.
General Rules

Know what to do if there is a fire drill during a laboratory
period; containers must be closed, gas valves turned off,
fume hoods turned off, and any electrical equipment turned
off.

Handle all living organisms used in a laboratory activity in
a humane manner. Preserved biological materials are to be
treated with respect and disposed of properly.

When using knives and other sharp instruments, always
carry with tips and points pointing down and away. Always
cut away from your body. Never try to catch falling sharp
instruments. Grasp sharp instruments only by the handles.
General Rules

Any time chemicals, heat, or glassware are used, students will
wear laboratory goggles. There will be no exceptions to this rule!

Contact lenses should not be worn in the laboratory unless you
have permission from your instructor.

Dress properly during a laboratory activity. Long hair, dangling
jewelry, and loose or baggy clothing are a hazard in the
laboratory. Long hair must be tied back and dangling jewelry and
loose or baggy clothing must be secured. Shoes must completely
cover the foot. No sandals allowed

Lab aprons have been provided for your use and should be worn
during laboratory activities.
Clothing and PPE

Report any accident (spill, breakage, etc.) or injury (cut, burn,
etc.) to the instructor immediately, no matter how trivial it may
appear.

If you or your lab partner are hurt, immediately yell out to get
the instructor’s attention.

If a chemical splashes in your eye(s) or on your skin, immediately
flush with running water from the eyewash station or safety
shower for at least 20 minutes. Notify the instructor immediately.

Use fire blanket or fire extinguisher in the event of a fire.

Know where the fire alarm is in the event of an uncontrolled fire.
In case of an accident…

P – Pull the pin
Most extinguishers use locking pin to prevent
inadvertent operation. Pulling the pin unlocks
the operating level to allow discharge
operation.
A - Aim low
Point the extinguisher nozzle at the base of
the fire.
S - Squeeze the lever

S - Sweep from side to side


A lever below the handle or some other type of
triggering device must be engaged to release the
extinguishing agent.
Fire Extinguisher
Flame-retardant wool or other types of
materials can be helpful in smothering
small fires.
 Fire blankets should be used in the event
of a person’s clothing being on fire.
 Never wrap a standing person on fire in a
fire blanket. This can create a “chimney
effect.”
 Stop, Drop, and Roll!!!

Fire Blanket

An eyewash and acid shower are necessary in case of a chemical
exposure incident.
◦ Walk swiftly to the shower. Do not run, you may lose your balance and
fall, or fling particles of the chemicals onto others.
◦ Turn on the shower full blast, and stand directly beneath the
stream.
◦ Take off all of your clothes. The embarrassment of nudity is nothing
when compared to third degree chemical burns, corroded flesh, radioactive
poisoning, etc. Whatever barrier you had against the exposure is now
exposed, and must be removed immediately. Kick them to the side.
◦ Separate your legs and arms, so that there are no "hidden" parts or
crevices of your body.
◦ Remain in the shower for longer than you think may be reasonable,
even if any burning has subsided.
Safety Shower

A fume hood is an engineering control
that provides local exhaust ventilation. It
usually has a moveable front sash or
window with safety glass.

The hood is essential in exhausting
hazardous gases, particulates, vapors,
etc. It protects both students and
teachers form inhalation exposure.
Fume Hood

All chemicals in the laboratory are to be considered
dangerous.
 Do not touch, taste, or smell any chemicals unless specifically
instructed to do so.
 The proper technique for smelling chemical fumes will be
demonstrated to you.

Check the label on chemical bottles twice before
removing any of the contents. Take only as much
chemical as you need.

Never return unused chemicals to their original
containers.
Handling Chemicals

Never remove chemicals or other
materials from the laboratory area.

In the event of a spill, let the instructor
know immediately so they can determine
the best plan for clean-up.

More dangerous spills will require the
Chemical Spill Kit
Handling Chemicals
Safety Symbols
Safety Symbols
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Websites:
◦ http://www.lisgar.net/magwood/whmis.JPG
◦ http://www.sde.ct.gov/sde/lib/sde/pdf/curriculum/s
cience/safety/science_safety.pdf
◦ http://www.flinnsci.com/media/396468/safety_cont
ract_hs.pdf
◦ http://www.ehsexperts.com/portals/0/Images/subpages/NFPA-Fire-Diamond-Chemical-Hazard-2.png
References
Create a Safety Map
 Sketch a map of the science lab noting the location of desks, lab benches
and other furniture.

On your map, locate each of the following safety equipment. Use the number
to note the location of the equipment on your map.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Fire extinguisher
Fire blanket
Fire alarm
Safety goggles
Aprons
Eyewash station
Exits
Telephone
Disposal container for broken glass
Fume hood
Work with a partner. Each person needs to turn in a map. When done with the map, pick
up a copy of the SpongeBob Safety Worksheet from the front table.
Activity 1: Create a Safety Map

For each of the following scenarios,
answer the following questions:
◦ What did the student(s) do wrong?
◦ What should the student(s) have done instead?
◦ If necessary, what emergency actions should
be taken?
Activity 2: Lab Safety Scenarios
Lab Safety Situations
Lab Safety 1
A student in group 2
spilled alcohol on their lab
table and wiped it up with
paper towels. They threw
the wet paper towels into
the garbage can.
Paige, Mina, Tommy loved
science class and could not
wait to begin their lab.
Tommy lit the Bunsen burner
and stretched across the
flame to give Mina a beaker.
Lab Safety 2
Lab Safety 3
Terry was observing given a
sample substance. The
element had a sweet smell.
He decided to take a big
smell of it. He decided to dip
his finger in it to check the
taste.
Austin and Karen had just
completed the testing of
sample A. About that time,
the bell rang to change
classes. Austin and Karen
left for their next class.
Lab Safety 4
Sam was heating a chemical
in a test tube. The tube
fogged over and he could not
see that material in the tube.
Sam decided to look over
into the tube with his goggles
up on his head.
Lab Safety 5
Lana finished the lab just
as the class bell rang. She
knew that lunch was in
one hour. She decided to
wash her hands at that
time.
Lab Safety 6
While prying open a sample
container, Rachel cut her
hand. It was not bleeding
bad so she wiped it with a
tissue she had in her
pocket.
Lab Safety 7
 While
one group was cleaning
up, they noticed a small
crack in the test tube. They
were afraid that they would
get blamed with it and it was
very small so they put it
away with the others.
Lab Safety 8
John arrive to the science lab
just after break. With his
unfinished pack of crackers in
his pocket, he and his lab
partner begin the assignment
as instructed by the teacher.
During the class, he finishes the
crackers.
Lab Safety 9
When group 4 completed
their lab practice early,
they decided to perform
some experiments on the
remaining chemicals.
Lab Safety 10
Zeke spilled the contents of
a beaker on the floor. He
didn’t tell the teacher
because he didn’t want to
get into trouble.
Lab Safety 11