Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"

Q: Fact: surfaces rubbing together causes an object to lose energy.

A: what causes an object to lose energy?
****
Q: Fact: wood ducks can feed at more than one trophic level.

A: What can feed at more than one trophic level?
****
Q: Fact: Silt forms from when rocks break down.

A:
Where does silt come from?
****