Lab safety
Authored by Theodore Chan
Science
7th Grade
Used 24+ times
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which one of the scientists below is wrongly matched to his/her contribution?
Marie Curie - proposed the theory of evolution.
Albert Einstein - discovered the basic relationship between energy and matter.
Stephen Hawking - discovered a way to describe black holes mathematically.
Charles Kao - enabled optical fibres to be used in telecommunications.
Thomas Edison - invented light bulb.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not an observation that you can make about a glass of iced water at room temperature?
The glass is cold
The ice is melting.
Mist appears on the surface of the glass.
The water will turn into ice if the temperature drops below 0˚C.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which hazard warning label should be put on a reagent bottle containing vinegar (醋)?
B
D
H
F
E
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which hazard warning label should be put on a reagent bottle containing concentrated hydrochloric acid (濃鹽酸)?
B
A
D
G
C
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A teacher asks you to heat a beaker of alcohol to 78˚C. The hazard warning label shown is put on the reagent bottle. Which is the correct way to handle this?
Heat it up with a candle flame.
Heat it up with a Bunsen flame.
Heat it up in hot water.
Tell the teacher that alcohol cannot be heated up because it will catch fire.
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
You are asked to mix two chemicals together to produce a toxic gas. In what equipment in the lab should you carry out the mixing?
(a)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
WD-40 is a common lubricant (潤滑劑). The hazard warning label shown can be found on its container. Which of the following is/are safety precaution(s) when handling it?
Store it in the kitchen.
Store it in a well-ventilated place.
Use it in a room when all the windows and doors are closed.
Put it under the sun.
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