Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Through a process called electromagnetic induction, generators change the kinetic energy of a spinning turbine to electrical energy.
Through a process called electromagnetic induction, generators change what energy form of a spinning turbine to electrical energy?

Opaque is the term for matter that does not let any light pass through.
What is the term for matter that does not let any light pass through?

Ice cubes are an example of the solid form of water.
Ice cubes are an example of which form of water?