PASSAGE IV
It is the business of the scientist to accumulate
knowledge about the universe and all that is in it, and to find, if
he is able, common …16… (A. approaches B. instruments
C. factors D. experiments) which underlie and account for the
facts that he knows. He chooses, when he can, the method of
the controlled …17… (A. experiment B. respondent C. data
D. system). If he wants to find out the effect of light on growing
plants, he takesmanyplants, as alike as possible. Some he stands
in the sun, some in the shade, some in the dark; all the time
keeping all other …18… (A. procedures B. conditions C. studies
D. objects) (temperature, moisture, nourishment) the same. In
thisway, by keeping other variables…19… (A. dark B. constant
C. good D. natural), and by varying the light only, the effect of
light on plants can be clearly seen. This …20… (A. method
B. research C. tool D. rationale) of using ‘controls’ can be
applied to a variety of situations, and can be used to find the
answers to questions as widely different as ‘must moisture be
present …21… (A. bar B. gold C. iron D. an alloy) is to rust?’
and ‘which variety of beans gives the greatest yield in one…22..
(A. period B. season c. climate D. weather)?’
In the course of his…23… (A. inquiries B. findings
C. queries D. experiment), the scientistmay find what he thinks
is one common explanation for an increasing number of facts.
The explanation, if it seems consistently to fit the various facts,
is called ..24… (A. a principle B. a thesis C. a hypothesis D. an
antithesis). If this continues to stand the test of numerous
experiments and remainsunshaken, it becomesa …25… (A.notion
B. deduction C. law D. thesis).
…16… (A. approaches B. instruments C. factors D. experiments)
Stress your limit with past questions and answers