500 N is how much force that will be exerted to the cannon
When warm air rises it pushes the cold air down and the air around us turns cold. I would sat A: global temperature decreases... but its not necessarily global. So best answer would be B.
A lunar eclipse is when the earth passes between the sun and moon and a solar eclipse is when the moon passes between the earth and sun. The better know eclipse is the solar eclipse, when the moon blocks the sun except for the corona.