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: Cirrus, stratus, and cumulus are the main types of what? Answer: clouds

SOLUTION: Clouds are classified on the basis of where and how they form. Three main types of clouds are cirrus, stratus, and cumulus. Figure below shows these and other types of clouds.

PROBLEM: Question: Mineral crystals that form when magma cools are usually _______ than crystals that form when lava cools. Answer: larger

SOLUTION: Mineral crystals that form when magma cools are usually larger than crystals that form when lava cools.

PROBLEM: Question: What helps control the muscles and maintain balance? Answer: nervous system

SOLUTION:
Staying balanced when riding a scooter requires control over the body's muscles. The nervous system controls the muscles and maintains balance.