AnswersFL-2001340-Environmental Science AFormulating Scientific Questions

Laboratory Safety Answers

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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.
2
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Kim knows that today’s lab investigation will involve heating liquids over an open flame. Which apparel choice would indicate that Kim planned to stay safe during the investigation?

A
a lab coat with long sleeves
B
open-toed, platform shoes
C
a long, loosely wrapped scarf
D
bracelets with dangling charms
3

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
4

What is the most important action for all students to take to stay safe in a science lab?

A
Follow all instructions that are given by the teacher.
B
Do not talk with students sitting nearby.
C
Know where all laboratory equipment is located.
D
Have 911 programmed into one cell phone per table.
5

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.
6

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
7

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.
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

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.
10

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

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