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?"

[EX Q]: Fact: Bacteria are single-celled organisms that lack a nucleus.
[EX A]: What are single-celled organisms that lack a nucleus?

[EX Q]: Fact: Gravitational pull causes alternative day cycles.
[EX A]: What causes day and night?

[EX Q]: Fact: Electrons separating from atoms in certain bright astronomical objects forms plasma.
[EX A]:
Electrons separating from what in certain bright astronomical objects forms plasma?

