Question

a student reported that a wilted stalk of celery became crisp when placed in a container of ice water. the student then suggested that water entered the stalk and made it crisp. this suggestion is considered to be
a. a control
b. a hypothesis
c. an observation
d. a variable
o a
o b
o c
o d

Explanation:

A hypothesis is a proposed explanation for a phenomenon. The student observed the celery becoming crisp in ice - water and then proposed that water entering the stalk made it crisp, which is a proposed explanation and thus a hypothesis. A control is a standard for comparison in an experiment. An observation is simply noting what happens. A variable is a factor that can change in an experiment.

Answer:

B. a hypothesis