1.4 Matter And The Scientific Method
Many science classes begin with the scientific method. Here we consider a systematic approach to discovery, including observation, hypothesis, experiment, conclusions, controls, and theories and laws.
- 1.
A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as
- A.
A hypothesis
- B.
A law
- C.
A theory
- D.
None of the above
Correct Answer
B. A lawExplanation
a law should never be corrected; a law is the highest standard that science can hope to determineRate this question:
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- 2.
A unifying principle that explains a body of facts and relations is referred to as
- A.
A hypothesis
- B.
A law
- C.
A theory
- D.
None of the above
Correct Answer
C. A theoryExplanation
scientists work their way up from clueless to a hypothesis , to a theory. then to a law, then they die. Just kidding.Rate this question:
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- 3.
Which of the following is an example of a physical property?
- A.
Corrosiveness of sulfuric acid
- B.
Toxicity of cyanide
- C.
Flammability of gasoline
- D.
Neutralization of stomach acid with an antacid
- E.
Lead becomes a liquid when heated to 601C
Correct Answer
E. Lead becomes a liquid when heated to 601CExplanation
when sulfuric acid corrodes something it turns it into something else- that's chemical
when cyanide is ingested it causes a chemical change in the patient
gasoline combines with oxygen to form carbon dioxide and water- a chemical change
stomach acid (hydrochloric acid) combines with a base to form salt and water- new substances are formed; this is a chemical change
when lead melts it simply becomes liquid lead; it is still lead; this is a physical changeRate this question:
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- 4.
Which one of the following is an example of a physical property?
- A.
Dynamite explodes
- B.
Meat rots if it is not refrigerated
- C.
Gasoline burns
- D.
Ice floats on top of liquid water
- E.
A silver platter tarnishes
Correct Answer
D. Ice floats on top of liquid waterExplanation
all are forming new substances except the ice floating- no chemical change there.Rate this question:
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- 5.
All of the following are properties of tin. Which one is a chemical property of tin?
- A.
Tin can be hammered into a thin sheet.
- B.
At –40C a sheet of tin crumbles to a gray powder.
- C.
At –40C a sheet of tin crumbles to a gray powder.
- D.
When a bar of tin is bent, it emits an audible “cry”.
- E.
Tin erodes when added to hydrochloric acid, and a clear gas forms.
Correct Answer
E. Tin erodes when added to hydrochloric acid, and a clear gas forms.Explanation
malleabililty is physical
melting is physical
the tin is still tin when it "cries"
But when it reacts with HCl it forms new substances- that's physicalRate this question:
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- 6.
A tentative explanation for a set of observations that can be tested by further experimentation is referred to as
- A.
Hypothesis
- B.
A law
- C.
A theory
- D.
None of the above
Correct Answer
A. HypothesisExplanation
sometimes referred to as an educated guessRate this question:
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- 7.
Choose the response that includes all the items listed below that are pure substances. 1. orange juice 2. steam 3. ocean water 4. oxygen 5. vegetable soup
- A.
1 only
- B.
2 4
- C.
1 3 4
- D.
4 only
Correct Answer
B. 2 4Explanation
there are numerous pure substance in orange juice, ocean water, and soup. However, steam is pure water, and oxygen is an element; both are pure.Rate this question:
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Current Version
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Mar 20, 2023Quiz Edited by
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Dec 01, 2013Quiz Created by
Harry Brielmann
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