TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Landslides moving loose rocks downhill process is the best example of a sudden change to earth’s surface.

SOLUTION: Which process is the best example of a sudden change to Earth’s surface?

PROBLEM: Ionic compounds contain cations and anions rather than discrete neutral molecules.

SOLUTION: Ionic compounds contain cations and anions rather than what?

PROBLEM: Screws move objects to a higher elevation by increasing force applied.

SOLUTION:
Screws move objects to a higher elevation by increasing what?