TASK DEFINITION: Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
PROBLEM: Question: What type of species can alternate between medusa and polyp forms? Answer: cnidarian

SOLUTION: As you can see in Figure below , both body plans have radial symmetry. Some cnidarian species alternate between medusa and polyp forms. Other species exist in just one form or the other.

PROBLEM: Question: What is found in abundance in the polar ice caps and under the surface of mars? Answer: water

SOLUTION: There is a lot of water ice in the polar ice caps and under the surface of Mars.

PROBLEM: Question: What do you call a unique substance formed when two or more elements combine chemically? Answer: compound

SOLUTION:
Compounds are unique substances that form when two or more elements combine chemically. The smallest particles of compounds are molecules. Some compounds form crystals instead.