TASK DEFINITION: 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?"
PROBLEM: Fact: narcotic analgesics act on most invertebrates to relieve pain.

SOLUTION: How do most analgesics work on invertebrates?

PROBLEM: Fact: when rivers slow, sediment is dropped at the mouth of a river by water.

SOLUTION: Sediment is dropped at the mouth of a river by water when what happens?

PROBLEM: Fact: If frozen fossils are found in permafrost, that plant used to live in that place.

SOLUTION:
If what are found in permafrost, that plant used to live in that place?