Earth's moon has more gravity than Earth
rotates in the same amount of time that it revolves
O has a thick atmosphere that protects it from asteroids
O is the largest satellite in the solar system

Earth's moon:

does not have more gravity than Earth.

does rotate in the same amount of time that it revolves.

does not have a thick atmosphere that protects it from asteroids.

is not the largest satellite in the solar system.

Explanation:

has more gravity than Earth  (FALSE)

rotates in the same amount of time that it revolves  (TRUE)

has a thick atmosphere that protects it from asteroids  (FALSE)

is the largest satellite in the solar system (FALSE)

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.