Section 9
Chemistry and Society
Section 9
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Assignment-CHEM Basics1
Solve all the following questions by supplying the correct answer after each question.
1) On Mars gravity is one-third that on Earth. What would be the weight on Mars of a person
who has a weight of 150 pounds (lb) on Earth?
(0.2 points)
A) 50 lb
B) 150 lb
C) 450 lb
D) 300 lb
Answer is:
2) Which of the following is a physical change?
(0.2 points)
A) Carbon combines with oxygen to form carbon dioxide.
B) Ice melts at 0°C.
C) A red substance is decomposed by heat to form mercury and oxygen.
D) Water is decomposed by electricity into hydrogen and oxygen.
Answer is:
3) Which of the following is NOT true for a scientific law?
A) It summarizes observed scientific data.
B) It is often stated in mathematical terms.
C) It is a solution to a problem.
D) It is universal and will hold everywhere under the stated conditions.
Answer is:
(0.2 points)
Section 9
4) The results of an experiment are easiest to interpret when the experiment has ____variable(s).
(0.2 points)
A) 1
B) 2
C) 4
D) 10
Answer is:
5) Which of the following statements about basic research is NOT correct?
(0.2 points)
A) Basic research is conducted primarily in universities and research institutes.
B) The results of basic research are often used as the basis for technological advances.
C) Basic research is carried out to develop a particular product.
D) Basic research is the search for knowledge for its own sake.
Answer is: