Nature Of Science: Safety
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Test your knowledge of Science safety rules.
- 1.Mrs. Price reviewed the safety precautions for working with sharp objects. Which activity most likely requires following these safety practices?
- A.
Determining the mass of an empty beaker
- B.
Scooping 20 g of chemical powder from a storage container
- C.
Constructing a model of an animal cell
- D.
Viewing a stained slide with a microscope
- 2.
![Sarah’s lab group is trying to determine the identity of four unknown powders. Below are
each student’s suggestions about how to test the powders.Which student’s suggestion is the safest way to begin?
- ProProfs]( "Sarah’s lab group is trying to determine the identity of four unknown powders. Below are
each student’s suggestions about how to test the powders.Which student’s suggestion is the safest way to begin?")
Sarah’s lab group is trying to determine the identity of four unknown powders. Below are each student’s suggestions about how to test the powders.Which student’s suggestion is the safest way to begin?- A.
Sarah
- B.
David
- C.
Lena
- D.
Kesha
- 3.While working in the lab, Shelia masses 20 g of sodium hydroxide on the triple beam balance then masses 20 g of sodium bicarbonate. Both are white powders but react to other chemicals in very different ways. Shelia is not certain which white powder is the sodium hydroxide. What should she do?
- A.
Place both powders in the trash and start over
- B.
Place a drop of water on a small amount of each powder and observe
- C.
Proceed with the experiment
- D.
Check with her teacher for guidance
- 4.
![What does this symbol indicate about a chemical? - ProProfs]( "What does this symbol indicate about a chemical?")
What does this symbol indicate about a chemical?- A.
It can cause injury to body tissue
- B.
It is unstable in water
- C.
It catches fire easily
- D.
It is hazardous to the environment
- 5.Your lab group has completed the first of many water sampling activities. Empty sample bottles, pipettes, and microscope slides used during the activity remain on the lab counter. The best lab practice is to --
- A.
Wipe the glassware with paper towels
- B.
Leave the materials exactly where they are for the next sampling activity
- C.
Turn the sample bottles and pipettes upside down to drain and dry
- D.
Wash all the supplies with detergent, rinse thoroughly, and allow them to dry
- 6.Which of these is an example of an unsafe practice in a lab or classroom?
- A.
Testing a substance by tasting it
- B.
Watering a plant without wearing gloves
- C.
Using a glass rod to stir liquid in a glass beaker
- D.
Detecting an odor by moving air toward you with your hand
- 7.During a scientific investigation, Max spills a few small drops of a chemical on his arm. Which of the following should Max do FIRST?
- A.
Put gloves on over his hands.
- B.
Rinse his arm with water and inform his teacher
- C.
Clean up the other spilled drops before anyone else is hurt.
- D.
Look in his notes to find out if the chemical was dangerous.
- 8.Students were asked to observe pond organisms in a Petri dish. At the end of class, which of these is the MOST appropriate clean -up method?
- A.
Wipe the lab bench with a paper towel, and rinse hands with alcohol.
- B.
Wipe the lab bench with dry brush, and dry hands with a paper towel.
- C.
Wipe the lab bench with disinfectant, and wash hands with soap and water.
- D.
Wipe the lab bench with a paper towel, and wash hands with soap and water.
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