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Safety In the Science Lab
Rules and Symbols
Lab Safety: Everyone Is Responsible!
Safety First
• Science is a hands-on laboratory class.
• You will be doing many laboratory activities, which require the use of hazardous chemicals.
• Safety in the science classroom is the #1 priority.
• To ensure a safe science classroom, a list of rules has been developed and provided to you in your student safety contract.
• These rules must be followed at all times.
• A signed lab safety contract is required to participate in labs.
General Safety Guidelines
• Be Responsible at All Times. No horseplay, practical jokes, pranks, etc.
• Follow all instructions carefully.
• Do not play with lab equipment until instructed to do so. • Food & drinks are not allowed in the science classroom.
Lab Safety: Everyone Is Responsible!
General Safety Guidelines
• Keep the science room clean and organized.
Lab Safety: Everyone Is Responsible!
• Notify the teacher immediately of any accidents or unsafe conditions in the science classroom! • Wash your hands with soap and water after experiments.
• Wear safety goggles when working with chemicals,
flames, or heating devices.
• If a chemical gets in your eye, flush in water for 15
minutes and notify the teacher.
Safety Symbols Eye Protection
Sharp Objects • When using knifes or other sharp objects always
walk with the points facing down.
• Cut away from fingers and body.
Electrical Safety • Do not place a cord where someone can trip over it.
• Never use electricity around water.
• Unplug all equipment before leaving the room.
Safety Symbols Animal Safety
• Only handle living organisms with teacher
permission.
• Always treat living organisms humanely.
• Wash your hands after handling animals.
Heating Safety
• Tie back hair and loose clothes when working
with open flames.
• Never look into a container as you are heating it.
• Heated metal and glass looks cool, use tongs or
gloves before handling.
• Never leave a heat source unattended.
Safety Symbols Hand Safety
• If a chemical spills on your skin, notify the teacher and
rinse with water for 15 minutes.
• Carry glassware carefully.
Plant Safety • Do not eat any plants in lab.
• Wash your hands after handling plants.
Safety Symbols
•Handle all glass with care.
•Do not use chipped, cracked or broken glassware.
•Do not heat or cool glassware unless told to do so.
Fire Hazard • Always wear goggles when using a flame or other heat
source.
•Never heat anything in the laboratory unless instructed
to do so.
•Never reach across a flame.
Glassware Hazard
Safety Symbols
•Never smell any chemical directly from its container.
•Do not mix, taste or handle chemicals unless instructed to
do so.
Foot Protection
•Wear closed-toe shoes in the lab to minimize the risk of
some- thing heavy, burning or sharp harming your feet.
Poison Hazard
Safety Symbols
•Toxic fumes may be present.
Radiation Hazard
Gas Protection
Explosion Hazard
Safety Equipment
• Fire Extinguisher – Located in outside
classroom door and in the computer lab
To operate the fire extinguisher remember P-A-S-S
P- Pull the Pin
A-Aim the hose at the base of the fire from 5-6 feet away.
S-Squeeze the handle.
S-Sweep the hose back and forth across the fire.
REMEMBER: Stop, Drop, & Roll On Fire?
What’s Wrong With This Picture?
What’s Wrong With This Picture?
What’s Wrong With This Picture?
What’s Wrong With These Statements?
• Hal says that his teacher is solely responsible for
preventing laboratory accidents.
• Keshia started the lab activity before reading it through
completely.
• Ricardo decided to do a lab activity that he read about in
a library book before the teacher came into the classroom.
• Stephanie says that the safety goggles mess up her hair
and give her raccoon eyes. She refuses to wear them.
• Barbie and Ken accidentally break a beaker full of some
chemical. Instead of risking getting in trouble they
quickly clean up the mess with paper towel and throw it
in the garbage.
Any Questions?
REMEMBER:
• Carefully read through the entire safety contract
and sign.
•Study for the safety quiz later this week or next
week!
Lab Equpiment
• Use:
– Helps protect your skin and clothing from chemicals
Lab Apron
Stoppers
• Use:
– Stop (close) laboratory glassware
– Different sizes for different size openings
Stoppers
Striker
• Use:
– Creates a spark used to light a Bunsen burner
Striker
Wire Gauze
• Uses
– To spread the heat of a flame and support lab equipment while heating
Wire Gauze
Crucible and Cover
• Use:
– Heat small amounts of solid materials at high temperatures
Crucible and Cover
Mortar and Pestle
• Use:
– To grind solids into a fine powder
Mortar and Pestle
Pipette
• Use:
– Transfer small amounts of liquid
Pipette
Forceps/Tweezers
• Use:
– Pick up or hold small objects
Forceps/Tweezers
Electronic Scale
• Use:
– Measure mass electronically
Electronic Scale
Triple Beam Balance
• To measure mass (weight) of substances or objects accurately
graduated cylinder (graduate)
• To measure volume of liquids accurately
SI Ruler (“Metric” is slang.)
• To measure the lengths of solid objects accurately
SI thermometer
• To measure temperature accurately
oC
magnifying glass (hand lens)
• To make objects appear larger than they are
Bunsen burner
• To heat substances (with a flame)
hot plate
• To heat substances using electricity, not a flame.
ring stand with clamp and ring
• To hold containers away from a heat source (such as fire) during an experiment
test tube
• To hold liquids and chemicals during experiments (investigations)
test tube holder
• To hold test tubes over heat or away from your body
medicine dropper (eyedropper)
• To drop small amount of liquids
Erlenmeyer flask
• To hold liquids
• NOT used to measure accurately
beaker
• To hold, pour, or estimate liquids
• NOT used to measure substances accurately
Funnel
To pour liquids from
one container to
another without
spilling anything
stirring rod
• To mix chemicals and hot liquids together (like a spoon)
tongs
• To pick up large objects that you should not touch (e.g., hot containers, flasks of acids, etc.)
safety goggles
• To protect eyes against burns or cuts
litmus paper
• To determine whether a liquid is an acid or a base
Petri dish
• To grow bacteria and other tiny living things
test tube brush
• To clean the insides of test tubes after investigations
test tube rack
• To hold test tubes during an investigation. (After cleaning, test tubes can be placed upside down to dry.)