Manned missions into the far reaches of outer space could require astronauts to be in weightless environments for years at-a-time. which of these is an effect of prolonged weightlessness on the human body?
a.
a stronger heart
b.
a loss of bone mass
c.
a weaker immune system
d.
a lack of sleep

answer: i dont know the answer but this might

explanation:

l

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but