TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: The way a mineral cleaves or fractures depends on the crystal structure of the mineral. Answer: the crystal structure

SOLUTION: The way a mineral cleaves or fractures depends on what part of the mineral?

PROBLEM: Passage: Opposite charges attract, and like charges repel. Answer: attract

SOLUTION: What do opposite charges do to one another?

PROBLEM: Passage: Energy is the ability to do work. When work is done, energy is transferred from one object to another. Energy can exist in different forms, such as electrical and chemical energy. Most forms of energy can also be classified as kinetic or potential energy. Answer: energy

SOLUTION:
Kinetic and potential are two forms of what?