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- The glassware sits on top of a ring stand with a wire gauze acting as a barrier in between. You should also be familiar with what to do during spills and accidents, as well as which types of chemicals help to neutralize certain substances. It's also...
- Don't report any accidents All accidents Only major accidents You should report all accidents to your instructor, no matter how small. This is for the safety of your classmates, the instructor and the class environment. Advertisement Which of the...
- This is to wash away any potential chemical residue and for hygienic purposes. Advertisement Which of these shoes are not allowed in the lab? Sneakers Open sandals Boots The right answer is open sandals. This is to prevent any chemicals from potentially spilling on exposed skin. Advertisement Which of the following is NOT used to describe hazardous waste? Reactivity Enzymatic Toxicity "Enzymatic" is not used to describe hazardous waste. The other trait, which is missing on this list, is "corrosivity. Toward your teacher Away from you and other lab members Toward you and other lab members Towards the ground The right answer is away from you and other lab members. For safety reasons, test tubes should never face you just in case there is a spill. Advertisement Why shouldn't water be added to solutions that contain concentrated acids?
- It might change color It could smell funny It could splatter The correct answer is that it could splatter. When water is added to a solution of concentrated acid, the chemicals may start to splatter and strike lab members. Advertisement How should you treat a minor burn on the skin? You should then let your instructor know what happened. Advertisement What is the proper way to mix acid and water together? Slowly add the water to acid while stirring it Slowly add the acid to water while stirring it Quickly pour the water into an acid solution Add the acid to water and shake the solution To properly mix water and an acid solution together, you should slowly add the acid to water while stirring it.
- This is to prevent any dangerous splattering from taking place. Micro spatula File Funnel A mortar and pestle is used for pressing down solids into a powder form. The mortar refers to the bowl and the pestle refers to the object that you use to press and mix the solids. Advertisement What should you do if your eye is affected by a chemical? Your instructor should then be notified of the situation. Advertisement Which of the following should you NOT do before starting work in a lab? Use chemicals to sanitize the pan balance Clean any glassware for use Wear safety equipment, including goggles, gloves and aprons Clean the work station You should never use any kinds of chemicals on a pan balance. Advertisement What is the proper way to smell a chemical in a tube? You should never smell the chemicals inside of a tube Place your nose directly above the tube "Fan" the fumes from the tube and toward your nose using your hands Press your nose to the side of the tube The correct answer is as follows: Use your hands to create a "fan" motion that will sweep the fumes from the tube and toward your nose.
- This way, your face is safely away from the tube. Advertisement Which of these can you bring into a lab? Gum Drinks Lab notebook You are allowed to bring a lab notebook into the lab to jot down any notes. Advertisement When should you familiarize yourself with the lab procedures? After lab work is over Read the procedures while completing lab work Before you enter the vicinity of the lab.
- The boundaries between the physical and life sciences are artificial. With the advancements in science today, one field overlaps into another; e. Physics-Based Physical Science A. Electricity Given the inherent dangers in the laboratory study of electricity, safeguards and safety procedures need to be in place for students and teachers. Consider the following safety specifications in working with electricity: Know where the master switch is for electricity in the laboratory in case of an emergency. Make students aware of the appropriate use of electricity and dangers of misuse and abuse. When using batteries, always inspect them first for damage including cracks, leakage. Discard in an environmentally appropriate way if any of these conditions occur. When unplugging cords, always pull cords from the plug at the electrical receptacle and never pull the cords from the wire.
- Use only ground fault interrupt circuits GFI protected circuits! Remove all conductive or metallic jewelry before working with electricity. Prevent trip and fall hazards by placing wires away from places where people walk. For routine maintenance like changing bulbs, make sure the device is unplugged before initiating the work. Never open a battery. The contents are corrosive and can be toxic or poisonous. When storing batteries, never allow the terminals to touch or short circuit. Be water phobic when working around electricity. Never use water or have wet hands when dealing with cords, plugs or electrical equipment. Never run a cord near or over a sink. Utility pipes such as water and gas are grounded. Do not touch an electrical circuit and utility pipes at the same time. Never plug damaged electrical equipment into a wall receptacle. This includes frayed wires, missing ground pin and bent plugs.
- Never overload circuits as they will overheat and cause power outages or fires. Back to top B. Electrostatic Generators: Electrostatic generators such as Van de Graaff generators are a real attention getter for students in the study of electrostatics. The following prudent safety procedures are in order, however: The generator should only be operated as a demonstration by the teacher. Electronic circuit or devices such as cell phones, computers and cameras can be permanently damaged by the machine's sparks.
- Keep them at least 50 feet 12 meters away. Always use a surge protector inline with the generator's power cord. Students with epilepsy, heart or nervous system conditions, or pacemakers should never be in the proximity of an electrostatic generator. Never operate the generator near flammable or combustible materials. Never leave the machine operating unattended.
- Back to top C. Ionizing Radiation: The use of ionizing radiation sources in middle school science laboratories is not advocated given the potential for unsafe exposure levels and health indication. Back to top D. Mechanics: The study of mechanics in physical science provides many touchstones to everyday applications for students. However, laboratory activities in this area are not without safety concerns. Students and teachers can be injured if hit by rapidly moving objects or projectiles. Always use caution when dealing with projectiles, falling objects, moving equipment, exposed belts, powerful permanent magnets, sharps such as Exacto knives and razor blades, and springs.
- Special attention should be given to the following safety procedures when working with model rockets. Use only lightweight, nonmetal parts for the nose, body and fins of the rocket. Use only commercially made model rocket engines. To prevent accidental eye injury, place launchers so that the end of the launch rod is above eye level or cap the end of the rod when it is not in use.
- Do not tamper with rocket engines or use them for any purposes except those recommended by the manufacturer. Launch rockets outdoors, in an open area and in safe weather conditions with wind speeds no greater than 20 mph. Use a recovery system such as a flame-resistant or fireproof streamer or parachute so that it returns safely and undamaged and can be flown again. Launch rockets with an electrical launch system and electrical motor igniters. The launch system should have a safety interlock in series with the launch switch, and will use a launch switch that returns to the "off" position when released. Use a safe launch distance of at least 15 feet 6 meters away from the launch pad for rockets with up to "D" size engines. Use 30 feet 1 meters when launching larger rockets engines.
- If the rocket misfires, remove the launcher's safety interlock or disconnect its battery. Wait 60 seconds after the last launch attempt before allowing anyone near the rocket. Launch a rocket from a launch rod, tower, or rail that is pointed within 30 degrees of the vertical to ensure the rocket flies nearly straight up. Use a blast deflector to prevent the engine's exhaust from hitting the ground. Do not launch rockets at targets such as tall buildings, power lines or near airplanes. Never put any flammable or explosive payload in a rocket. Do not attempt to recover rockets from power lines, tall trees or other dangerous places. Back to top E. Nonionizing Radiation — Lasers: Nonionizing radiation consists of electromagnetic radiation that lacks sufficient energy to ionize matter. These may include the use of lasers, microwaves and infrared radiation in the physical science laboratory. Nonionizing radiation can cause injury if handled improperly. It is prudent safety practice to have students and teachers wear ultraviolet-protected chemical splash goggles when working with ultraviolet light sources.
- Students' skin and eyes can be particularly sensitive to ultraviolet exposure. When using hand-held ultraviolet lamps for activities such as forensics or phosphoresce, use caution not to directly view the ultraviolet light source. The most common nonionizing radiation equipment used in physical science laboratories is the laser. Safety specifications vary depending on the class of laser instrument being used. The following general safety specifications provide prudent advice and direction for use in middle school physical science courses: Lasers, including handheld laser pointers, should be used only for demonstration purposes by the teacher. Connecticut has the following general statute relative to laser pointers: Connecticut General Statutes C. Limitation on sale and use of laser pointers a As used in this section, "laser pointer" means a hand-held device that emits a laser light beam and is designed to be used by the operator to indicate, mark or identify a specific position, place, item or object.
- No person under eighteen years of age shall possess a laser pointer on school grounds or in any public place, except as provided in subsection d of this section. Before operation, warn all individuals present of the potential hazard. Use the laser away from areas where the uninformed and curious might be attracted by its operation. In conspicuous locations inside and outside the work area and on doors giving access to the area, place hazardous warning signs indicating that a laser is in operation and may be hazardous.
- Remove all watches and rings before changing or altering the experimental setup. Shiny jewelry can cause hazardous reflections. Practice good housekeeping in the lab to ensure that no device, tool or other reflective material is left in the path of the beam. Cover all exposed wiring and glass on the laser with a shield to prevent shock and contain any explosions of the laser materials. Be sure all nonenergized parts of the equipment are grounded. Set up the laser so that the beam path is not at normal eye level, i.
- Use shields to prevent strong reflections and the direct beam from going beyond the area needed for the demonstration or experiments. Use only lasers operating inside the visible range. A key switch to lock the high voltage supply should be installed. View holograms only with a diverged laser beam. Be sure the diverging lens is firmly attached to the laser. Illuminate the area as brightly as possible to constrict the pupils of the observers. The target of the beam should be a diffuse material capable of absorbing the beam and reflection Do not at any time look into the primary beam of a laser. Do not aim the laser with the eye. Direct reflection can cause eye damage. Do not look at reflections of the beam. These, too, can cause retinal burns. Do not use sunglasses to protect the eyes. If laser safety goggles are used, be certain they are designed for use with the laser being used.
- Report any afterimage to a doctor, preferably an ophthalmologist who has had experience with retinal burns. Retinal damage is possible. Do not leave a laser unattended. Back to top F. Pressurized and Vacuum Systems: Pressurized gas cylinders can explode. Bell jars can implode.
- Teaching Science Lab Safety Packet is available here. Click here to see the Table of Contents. The Packet contains over 70 pages of ready-to-run materials covering Safety in the Science Lab. Can be purchased as a Download or a CD. You are welcome to use these ideas in your classroom, within your science department, within your school district, or to distribute to any teacher who may find these lessons useful. I only ask that: 1. You cannot sell these lessons or make a profit on them in any way. You cite the lessons original source, and do not white-out the copyright footer on the pdf files 3. Do not copy and paste lessons onto your website. A link to the original is to be used. Do not claim these lessons as your own work.
- Thanks, teachers! Safety Contract Review Each science district should have a standard safety contract, to be signed by both parents and student. Here's a nice way to review the first day of school: Give each student one minute to jot down any safety rules they remember from last year. Then ask pairs to share. Hand out the contracts. Ask small groups to circle on the contract all they remember as a group. Then ask each group to help you circle remembered rule numbers, which teacher circles on a transparency. Take notice of rules not recalled and go over "tricky" questions. Click here for a copy of our district's contract. Safety Rules Mind Map Another good way to review science safety rules is to have your students make on a mind map or concept map. Ask your students to refer to the safety contract or remember from last year. Draw a circle in the center of a sheet of white paper. Label it,"Science Safety Rules" Draw four lines out from circle spider legs.
- Label the lines with major components of safety, such as fire, eyes, glassware, etc. You could brainstorm this with your students. Then draw "feet" off the legs with a specific rule, paraphrased. Have the students add color and sketches. Thanks to Janet Enloe for this great idea! Lab Safety Equipment Hunt Our district requires students to know the location of science safety equipment. Make a worksheet with photos of safety equipment in your classroom. Have students walk around the room, listing the location of each safety item shown on the worksheet. Discuss by comparing their answers to an answer transparency. Lab Safety Equipment Flashcard Game Give each team a copy of photos or sketches of the safety equipment in your room, such as: fire extinguisher, fume hood, eye wash, safety shower, etc. Have each student cut them out and clip to Equipment Hunt worksheet when not in use. Play a fun game with partners. Each pair places their set on the table, scrambled together.
- Then the teacher says, "Put your finger on the eye wash. When they are down to just a couple flashcards, stop the game and have them count their piles and shake hands with the winner. Find Someone Who Worksheet Have students walk around finding students who know the answers to questions related to science lab safety. The "Someone Who Knows" must write the answer and sign their name on the student's paper. Click here. Safety Procedures Lab Have small groups of students move from station to station, following the directions on a Labsheet and answering the questions. Set up general lab situations and ask safety-related questions. I use a timer and give the groups about 3 minutes per station.
- Run off six sets ofyour Science Lab Safety Rules in white. To play the game: hand out the same scenario to each team. Hand out a set of Safety Rules Pieces. Teams put their heads together and quietly pick out all the rules that were broken in the scenario. When a team is done, they should say, "Done! The teacher writes down team numbers in order of finish. When all teams are finished, the class discusses which rules were broken and why. Different teams may have different inperpretations. That's okay! If first team finished is correct, they are in first place and receive 6 points. If they miss one and the second place team gets all correct, then they change places and points, etc.
- Second place gets 5 points, third place gets 4 points, etc. I do only one Scenario at a time, but you could do several if you have time. Safety Poster Assign each student one rule from the safety contract. Use 8 x 11 white paper. Stress Good "Billboard" Guidelines: 2" high letters. Three colors only plus black and white. Very few words - paraphrase rule to shorten. One strong, large picture. Before collecting, have small groups pick the "best" one, and put on chalk ledge. Have class vote on "best" one. Laminate and post in classroom for the year. Our students need to be prepared for the technological future! Safety PowerPoints Assign a different Safety Category for each small group, such as eyes, chemicals, fire, etc.
Laboratory Safety For Students | Faculty Of Science | Memorial University Of Newfoundland
Each group prepares a five page or less PowerPoint Presentation. Our librarian will teach any class how to make a PowerPoint. Most will already know how! Sign up for one day in the computer lab if you teach 90 minute blocks, probably two days if less. Each group presents to the class. Lots of fun if you have a smartboard, or large T. Prepare a worksheet for each group to critique and judge the presentations. They could vote for "Best of Show," etc. Not included here for obvious reasons, but here's a link to a similar test: Click here for an online, self-correcting safety test. All rights reserved.- Lab safety questions and answers Lab safety questions and answers C. Flammable materials should never be dispensed or used near flame or heat source. Make sure you know the rules. Chemistry — Safety in the Lab This activity is designed to be completed by students and parents. Don't forget, the most helpful safety rule is to use plain old common sense. Do not attempt this quiz until you have reviewed the safety material. Chemistry lab safety is achieved when all these rules are followed.
- General 1 Acco irdng to the safety instructions, if you fail to follow any safety rule: a you may pay a fine. Omkar S. You don't necessarily have to know the answer to a question -- the idea is to learn as you go. This test is also good at establishing if they have understood their lab safety rules. In this blog article we will explore what a competency-based interview is, provide you with some important tips for passing them, and also provide you with 25 sample questions complete with answers. In a laboratory, the following should not be worn. Quiz — Answer Key. Do not have a meal or drink in the lab; engage in research only during the lab, and do not taste or sniff chemicals. Lab Technician Interview Questions: The Laboratory Technician is in charge of laboratory equipment and hardware, making sure it is properly cared for, performing maintenance and repairs, and also replacing equipment when necessary.
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