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
- 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
- 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
- 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
- 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.
- 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
- 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
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