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Laboratory Safety Answers

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A student uses paper towels to clean up a small chemical spill in the lab. Where should the dirty paper towels be placed?

A
in the lab sink
B
in the wastebasket
C
in the chemical waste container
D
in the hazardous waste container
2
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Suppose that Louisa is cut by broken glass during a lab accident. Which is the proper place to dispose of the paper towels that are used to clean up the blood?

A
broken glass container
B
hazardous waste container
C
spilled chemicals container
D
classroom waste container
3

Lloyd’s lab partner is looking down into a test tube while he heats the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?

A
Wear safety goggles while looking into the opening of the test tube.
B
Cover the opening of the test tube so that no materials can boil out of it.
C
Move the test tube so that the opening is pointing away from all students.
D
Put the test tube in a hot water bath so that no water can enter its opening.
4

Which safe practice is part of using aseptic technique?

A
using a safety shower to wash chemicals off skin and clothing
B
wearing protective gloves when transferring bacteria and fungi to slides
C
folding and tying up the electric cord of a microscope before carrying it
D
using tongs and a hot mitt to remove a beaker of hot water from a hot plate
5

Before viewing prepared slides under a microscope, students should review the safety rules for

A
wearing safety goggles and lab aprons.
B
preventing and cleaning up chemical spills.
C
cleaning up and disposing of broken glass.
D
putting out fires and cleaning up after them.
6

Which is a safe practice for handling chemicals in a lab investigation?

A
Dispose of all chemicals down the sink with a lot of water.
B
Tell the teacher about any chemicals that were spilled in a lab.
C
Identify chemicals by smelling and tasting them.
D
Place beakers of chemicals near the edge of the counter.
7

Mario at lab table A needs a pair of forceps (tweezers). Max at lab table B tosses Mario a pair. In terms of laboratory safety, which best describes Max’s behavior?

A
It demonstrates a lack of planning.
B
It is unsafe and can result in someone getting hurt.
C
It is safe and appropriate.
D
It shows proper handling of equipment.
8

Lee and Celia are lab partners. While Celia pours a chemical into a graduated cylinder, some of the chemical splashes onto her arm. What should happen next?

A
Lee should continue working with Celia after helping wipe off her arm.
B
Lee should tell the teacher what happened to Celia when he leaves the lab.
C
Lee should tell the teacher while Celia washes her arm with soap and water.
D
Celia should stand in the safety shower while Lee tells the teacher.
9

Which action is designed to increase the safety of a person carrying a microscope from one place to another?

A
putting a cover over the microscope
B
setting the microscope to the high-power objective position
C
wrapping the electrical cord around the arm of the microscope
D
raising the stage of the microscope until it touches the objective
10

Which list best describes what should be worn by students in a biology lab where pouring chemicals into beakers is involved?

A
a long-sleeved shirt, safety glasses, protective gloves, and sandals
B
a long-sleeved shirt, safety glasses, protective gloves, and closed shoes
C
a lab coat, safety glasses, protective gloves, and sandals
D
a lab coat, safety glasses, protective gloves, and closed shoes

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