1) Water, , is an example of a(n) ________.
A) chemical
B) solid
C) wave
D) electric charge
E) element
Answer: A
2) In this list, which substance can be classified as a chemical?
A) salt
B) sleep
C) cold
D) heat
E) temperature
Answer: A
3) One example of a chemical used in toothpaste is ________.
A) chlorine
B) sulfur
C) carbon dioxide
D) calcium carbonate
E) sugar
Answer: D
4) Which of the following is not a chemical?
A) salt
B) water
C) light
D) carbon dioxide
E) sugar
Answer: C
5) Sodium monofluorophosphate is a chemical used in toothpaste to ________.
A) make the paste white
B) disinfect the toothbrush
C) keep the paste from spoiling
D) remove plaque
E) strengthen tooth enamel
Answer: E
6) Chlorofluorocarbons are broken down in the atmosphere by ________.
A) nitrogen dioxide
B) ozone
C) iron
D) AIDS
E) ultraviolet light
Answer: E
7) When a part of the body is injured, substances called ________. are released.
A) aspirins
B) pain relievers
C) nitrogen oxides
D) chlorofluorocarbons
E) prostaglandins
Answer: E
8) The production of smog from the chemical NO requires ________.
A) nitrogen
B) chlorine
C) water
D) oxygen
E) CFCs
Answer: D
9) When scientific information is used for industrial purposes, the discipline is known as ________.
A) the scientific method
B) marketing
C) commercial
D) hypothetical
E) technology
Answer: E
10) Employing scientific information to develop new materials to benefit society is an example of ________.
A) technology
B) philosophy
C) marketing
D) sociology
E) politics
Answer: A
11) DDT is a type of ________.
A) herbicide
B) war gas
C) plant
D) insecticide
E) metal
Answer: D
12) Chlorofluorocarbons are destructive to the ________.
A) ozone produced at ground level in traffic
B) water in the upper atmosphere
C) nitrogen dioxide in smog
D) ozone layer in the upper atmosphere
E) copper in telephone wiring
Answer: D
13) Titanium dioxide is a chemical used in toothpaste to ________.
A) make the paste white
B) disinfect the toothbrush
C) keep the paste from spoiling
D) remove plaque
E) strengthen tooth enamel
Answer: A
14) The first step in the scientific imethod is ________.
A) using technology
B) making observations
C) forming a hypothesis
D) doing experiments
E) proposing a theory
Answer: B
15) DDT was a good pesticide because ________.
A) it had low toxicity to animals
B) it was cheap to prepare
C) it was toxic to many insects
D) it had low toxicity to humans
E) all the above
Answer: E
16) One way to enhance your learning in chemistry is to ________.
A) study a little every day
B) form a study group
C) go to office hours
D) be an active learner
E) all the above
Answer: E
17) You notice that there is more traffic between 8 and 9 in the morning. This would be a(n) ________.
A) observation
B) hypothesis
C) experiment
D) theory
E) all the above
Answer: A
18) There is more traffic between 8 and 9 in the morning because most people start work at 9. This would be a(n) ________.
A) observation
B) hypothesis
C) experiment
D) theory
E) all the above
Answer: B
19) In order to enhance your learning in chemistry, you should not ________.
A) study a little every day
B) form a study group
C) go to office hours
D) be an active learner
E) wait until the night before the exam to study
Answer: E
20) Which of the following is a chemical?
A) sugar
B) heat
C) light
D) noise
E) a wave
Answer: A
P.2 True/False Questions
1) The reddish-brown color of smog is due to .
Answer: True
2) Chloroflourocarbons are broken down in the upper atmosphere to produce oxygen, .
Answer: False
3) DDT is effective against poison ivy.
Answer: False
4) The first step in using the scientific method is usually the observation of some natural event.
Answer: True
5) In the scientific method, a hypothesis has more data to support it than a theory.
Answer: False
6) Titanium dioxide in toothpaste is used as a detergent.
Answer: False
7) A theory is confirmed after one experiment is performed.
Answer: False
8) Alchemists believed there were four components of nature: earth, fire, air, and water.
Answer: True
9) Working with a group of studenst can help you learn chemistry.
Answer: True
10) Paracelsus was a Greek philosopher.
Answer: False
11) DDT was banned because it breaks down quickly in the environment.
Answer: False
P.3 Short Answer Questions
1) A chemical that consists of one type of matter and always has the same composition and properties is called a ________.
Answer: substance
2) The brown color of smog is caused by ________.
Answer: nitrogen dioxide
3) The use of observation and hypothesis are important steps in the ________ method.
Answer: scientific
4) DDT is an effective pesticide against ________.
Answer: insects
5) A test performed to determine if a hypothesis is valid is called a(n) ________.
Answer: experiment
6) A hypothesis can be tested by performing a(n) ________.
Answer: experiment
7) Any material used in or produced by a chemical reaction is a ________.
Answer: chemical
8) An observation takes place when a(n) ________ is noted.
Answer: natural phenomenon
9) Name the steps in the scientific method.
Answer: observation, hypothesis, experiment, theory
10) When scientific principles are used to produce consumer goods, the discipline is termed ________.
Answer: technology
11) An abrasive used in toothpaste is ________.
Answer: calcium carbonate
12) When a hypothesis is supported by many experiments is becomes a ________.
Answer: theory
13) The science that studies the properties and composition of substances is called ________.
Answer: chemistry
14) In the scientific method, after data is collected, a ________ is proposed which gives a possible explanation.
Answer: hypothesis
15) The substance the alchemists thought could turn metals into gold was called ________.
Answer: the philosopher's stone
16) The substances released when tissues are injured are ________.
Answer: prostaglandins
17) Substances which prevent spoilage are called ________.
Answer: antioxidants
18) The chemical used to make cans and foil is ________.
Answer: aluminum
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