Safety In the Science Labspiffyscience.weebly.com/uploads/.../lab_safety_lab... · • Safety in...
Transcript of Safety In the Science Labspiffyscience.weebly.com/uploads/.../lab_safety_lab... · • Safety in...
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Safety In the Science Lab
Rules and Symbols
Lab Safety: Everyone Is Responsible!
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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.
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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!
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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.
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• 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.
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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.
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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.
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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
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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
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Safety Symbols
•Toxic fumes may be present.
Radiation Hazard
Gas Protection
Explosion Hazard
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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?
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What’s Wrong With This Picture?
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What’s Wrong With This Picture?
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What’s Wrong With This Picture?
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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.
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Any Questions?
REMEMBER:
• Carefully read through the entire safety contract
and sign.
•Study for the safety quiz later this week or next
week!
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Lab Equpiment
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• Use:
– Helps protect your skin and clothing from chemicals
Lab Apron
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Stoppers
• Use:
– Stop (close) laboratory glassware
– Different sizes for different size openings
Stoppers
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Striker
• Use:
– Creates a spark used to light a Bunsen burner
Striker
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Wire Gauze
• Uses
– To spread the heat of a flame and support lab equipment while heating
Wire Gauze
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Crucible and Cover
• Use:
– Heat small amounts of solid materials at high temperatures
Crucible and Cover
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Mortar and Pestle
• Use:
– To grind solids into a fine powder
Mortar and Pestle
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Pipette
• Use:
– Transfer small amounts of liquid
Pipette
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Forceps/Tweezers
• Use:
– Pick up or hold small objects
Forceps/Tweezers
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Electronic Scale
• Use:
– Measure mass electronically
Electronic Scale
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Triple Beam Balance
• To measure mass (weight) of substances or objects accurately
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graduated cylinder (graduate)
• To measure volume of liquids accurately
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SI Ruler (“Metric” is slang.)
• To measure the lengths of solid objects accurately
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SI thermometer
• To measure temperature accurately
oC
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magnifying glass (hand lens)
• To make objects appear larger than they are
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Bunsen burner
• To heat substances (with a flame)
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hot plate
• To heat substances using electricity, not a flame.
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ring stand with clamp and ring
• To hold containers away from a heat source (such as fire) during an experiment
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test tube
• To hold liquids and chemicals during experiments (investigations)
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test tube holder
• To hold test tubes over heat or away from your body
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medicine dropper (eyedropper)
• To drop small amount of liquids
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Erlenmeyer flask
• To hold liquids
• NOT used to measure accurately
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beaker
• To hold, pour, or estimate liquids
• NOT used to measure substances accurately
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Funnel
To pour liquids from
one container to
another without
spilling anything
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stirring rod
• To mix chemicals and hot liquids together (like a spoon)
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tongs
• To pick up large objects that you should not touch (e.g., hot containers, flasks of acids, etc.)
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safety goggles
• To protect eyes against burns or cuts
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litmus paper
• To determine whether a liquid is an acid or a base
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Petri dish
• To grow bacteria and other tiny living things
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test tube brush
• To clean the insides of test tubes after investigations
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test tube rack
• To hold test tubes during an investigation. (After cleaning, test tubes can be placed upside down to dry.)