The corona . is the part of the sun that we see from Earth
releases mostly harmful UV and X-ray radiation
creates the sun's energy from nuclear reactions
is mostly made of helium atoms

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

yes it is weird but true

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.