Why can’t we fly up? Why we attract to the ground?
It is because of GRAVITY!!
Gravity is a force that attracts a body towards the center of the earth. It pulls things to the ground. For example, if we take a ball and drop it, that is the gravity that pulls it to the ground. Moreover, it keeps the sun, and planets in the orbit.
Why do you float in space?
We float in space because there is no gravity at there. The further you get away from the Earth, the less gravitational force there is (the less pulling downward to the earth). At there, no one can hear you scream because there is no air. No Air = No Sound, No Air = No Gravity