Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: and . The electric force is 39 orders of magnitudes bigger. Answer: 39
[EX A]: How many orders of magnitudes bigger is the electric force?

[EX Q]: Passage: When fuel is burned, most of the energy is released as heat. Some of this heat can be used to do work. Heat cooks food or warms your house. Sometimes the heat is just waste heat. It still heats the environment, though. Answer: heat
[EX A]: When fuel is burned, most of the energy is released in what form?

[EX Q]: Passage: Estimation, as used in measurement, is the process of referencing a physical quantity in terms of a calibration or reference point. All measurement devices have reference marks of some kind. Answer: estimation
[EX A]:
A reference point is used in measurement to make what?