TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Pressure and vibration are examples of physical type of stimuli.

SOLUTION: Pressure and vibration are examples of what type of stimuli?

PROBLEM: Solid is characterized by molecules with minimal movement and strong forces between them.

SOLUTION: Which state of matter is characterized by molecules with minimal movement and strong forces between them?

PROBLEM: Density allows cut logs to float on water.

SOLUTION:
What property allows cut logs to float on water?