W a Science Teacher Wants to Provide Students with Practice

Multiple Choice

W A science teacher wants to provide students with practice in the skill of defining operationally. What would be the most suitable activity?

A) The teacher provides a board with interchangeable gears and asks students to find the combination of two interlocking gears that produces the greatest change in gear speed.
B) The teacher asks the students to identify factors that can lead to childhood obesity.
C) The teacher provides the students with a time line of the major events that have occurred in the history of the earth and asks students to estimate how long the most recent ice age lasted.
D) The teacher provides students with sugar, water, a beaker, and a hot plate, and asks them to devise a way of making crystals.
E) All of the above
F) None of the above