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Topic 2.1
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1
What is matter?
A)anything that has mass
B)anything that has mass and volume
C)a chemical that is found in the body
D)a substance that chemically reacts with other substances
2
What percentage of the human body is made up of oxygen?
A)three percent
B)ten percent
C)eighteen percent
D)sixty-five percent
3
Which of the following statements is true?
A)A substance must always have useful effects.
B)A substance must always have harmful effects.
C)A substance can have both useful and harmful effects.
D)Substances are classified only by their uses in the home.
4
Which of the following is a characteristic of the substance ammonia?
A)burns skin and other body tissues
B)encourages bacteria to grow
C)can be used as fuel for heating and cooking
D)burns cleanly and efficiently in the presence of oxygen
5
Methane is a hazardous substance that…
A)kills bacteria and other germs.
B)produces fumes that can cause suffocation.
C)is used in cleaning products.
D)burns cleanly and efficiently in the presence of carbon dioxide.
6
The production of a plastic bag…
A)does not require the use of energy.
B)takes more energy than the production of a paper bag.
C)takes less energy than producing a paper bag.
D)takes the same amount of energy as the production of a paper bag.
7
What is the main hazard associated with the use of plastic bags?
A)Plastic bags won’t decompose over time.
B)Plastic bags are so convenient that people use more of them.
C)Plastic bags are not durable.
D)Plastic bags dissolve easily in water.
8
WHMIS symbols indicate…
A)information about the protective clothing used in a laboratory setting.
B)information about chemicals, equipment, and procedures in an experiment.
C)the level of science expertise needed to perform an experiment.
D)only the safety standards to be followed during the experiment.
9
Which of the following is a safety rule that should be remembered when using an open flame?
A)All chemicals can be placed within 20 centimeters of an open flame.
B)An open flame is always safe; there is no need to watch it.
C)Check on the open flame every two minutes.
D)Never leave an open flame unattended.





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