Safety In the Science Lab Rules and Symbols

Transcription

1 Lab Safety: Everyone Is Responsible! Safety In the Science Lab Rules and Symbols

2 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.

3 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!

4 General Safety Guidelines Keep the science room clean and organized. Notify the teacher immediately of any accidents or unsafe conditions in the science classroom! Wash your hands with soap and water after experiments. Lab Safety: Everyone Is Responsible!

5 Eye Protection Safety Symbols 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. 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.

6 Animal Safety Heating Safety Safety Symbols Only handle living organisms with teacher permission. Always treat living organisms humanely. Wash your hands after handling animals. 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.

7 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.

8 Glassware Hazard 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.

9 Safety Symbols Poison Hazard 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.

10 Safety Symbols Gas Protection Toxic fumes may be present. Radiation Hazard Explosion Hazard

11 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. On Fire? REMEMBER: Stop, Drop, & Roll

12 What s Wrong With This Picture?

13 What s Wrong With This Picture?

14 What s Wrong With This Picture?

15 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.

16 Any Questions? REMEMBER: Carefully read through the entire safety contract and sign. Study for the safety quiz later this week or next week!

17 Lab Equpiment

18 Lab Apron Use: Helps protect your skin and clothing from chemicals

19 Use: Stoppers Stop (close) laboratory glassware Different sizes for different size openings

20 Use: Striker Creates a spark used to light a Bunsen burner

21 Uses Wire Gauze To spread the heat of a flame and support lab equipment while heating

22 Crucible and Cover Cover Use: Heat small amounts of solid materials at high temperatures

23 Mortar and Pestle Pestle Use: To grind solids into a fine powder

24 Pipette Use: Transfer small amounts of liquid

25 Forceps/Tweezers Use: Pick up or hold small objects

26 Electronic Scale Scale Use: Measure mass electronically

27 Triple Beam Balance To measure mass (weight) of substances or objects accurately

28 graduated cylinder (graduate) To measure volume of liquids accurately

29 SI Ruler ( Metric is slang.) To measure the lengths of solid objects accurately

30 o C SI thermometer To measure temperature accurately

31 magnifying glass (hand lens) To make objects appear larger than they are

32 Bunsen burner To heat substances (with a flame)

33 hot plate To heat substances using electricity, not a flame.

34 ring stand with clamp and ring To hold containers away from a heat source (such as fire) during an experiment

35 test tube To hold liquids and chemicals during experiments (investigations)

36 test tube holder To hold test tubes over heat or away from your body

37 medicine dropper (eyedropper) To drop small amount of liquids

38 Erlenmeyer flask To hold liquids NOT used to measure accurately

39 beaker To hold, pour, or estimate liquids NOT used to measure substances accurately

40 Funnel To pour liquids from one container to another without spilling anything

41 stirring rod To mix chemicals and hot liquids together (like a spoon)

42 tongs To pick up large objects that you should not touch (e.g., hot containers, flasks of acids, etc.)

43 safety goggles To protect eyes against burns or cuts

44 litmus paper To determine whether a liquid is an acid or a base

45 Petri dish To grow bacteria and other tiny living things

46 test tube brush To clean the insides of test tubes after investigations

47 test tube rack To hold test tubes during an investigation. (After cleaning, test tubes can be placed upside down to dry.)