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Laboratory Safety Answers

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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.
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3

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.
4

Which statement describes how to appropriately handle live earthworms in a lab investigation?

A
Pick up earthworms gently with moist hands.
B
Place individual earthworms on the lab table while setting up equipment.
C
Press the ends of the earthworms firmly against the table to keep them still.
D
Hold onto earthworms tightly with metal tweezers.
5

Maribel brings her backpack to the lab. She is also given a set of lab materials. What is the safest way for Maribel to organize these items in the lab?

A
Both the personal items and the lab materials should be arranged neatly along the edge of the table.
B
Both the personal items and the lab materials should be arranged in the center of the table.
C
The lab materials should be in the center of the table, and the personal items should be on the edge of the table.
D
The personal items should be off the table, and the lab materials should be placed neatly away from the edge of the table.
6

Jacob is unsure about how to focus a slide under the microscope. What would be Jacob’s best course of action?

A
Ask the teacher for instructions.
B
Ask his lab partner for instructions.
C
Watch another student, and copy what he or she does.
D
Use the trial-and-error method until the slide focuses.
9

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
10

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.

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Laboratory Safety Answers — RVACR Ecology