TASK DEFINITION: Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.
PROBLEM: Fact: large trees block sunlight from reaching the ground

SOLUTION: Large trees block sunlight from reaching what?

PROBLEM: Fact: oceans cover 70% of the surface of the earth

SOLUTION: What substance covers more than sixty nine percent of the third rock from the sun?

PROBLEM: Fact: if a mineral can be scratched by a fingernail then that mineral is soft

SOLUTION:
Which is likely considered soft?