TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Gabbro is a dark dense rock that can be found in the oceanic crust.

SOLUTION: Gabbro is a dark dense rock that can be found in what?

PROBLEM: The climate is defined as the temperature plus precipitation of an area over a long period of time.

SOLUTION: What is defined as the temperature plus precipitation of an area over a long period of time?

PROBLEM: The ionic end of a detergent can either be a sulfate or sulfonate.

SOLUTION:
The ionic end of a detergent can either be a sulfate or what?