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

Example Input: When the energy of the earthquake reaches shore, it forms a huge wave called a tsunami.
Example Output: When the energy of the earthquake reaches shore, it forms a huge wave called?

Example Input: Sodium-potassium pumps help nerve cells establish a voltage across their plasma membranes.
Example Output: Sodium-potassium pumps help nerve cells establish a voltage across their what?

Example Input: Momentum an action and reaction occur, what is transferred from one object to the other, yet in combination it remains the same.
Example Output:
When an action and reaction occur, what is transferred from one object to the other, yet in combination it remains the same?