What if the earth dissapeared?

The earth can't dissappear, though eventually it will disappear.

We would all float off in space and die. Your welcome let's try and not let this happen.....

There's no way we can move to Mars since it's extremely hostile to life. You don't need to worry though, because Earth has been here for more than 4 billion years. It's highly unlikely it'll be destroyed within our species' lifetime.

We'd be screwed

We are not moving to Mars. Even if we had the means to move there (which we don't), there's no magnetic field, not enough temperature, barely an athmosphere, nor enough gravity to sustain human life

It kind of has. Technically maybe we are the only ones to know we exist... So technically nobody knows if we truly exist and earth may as well be non existent

No,

a few of us would go to heaven. The majority would go to quite a different place.

Surely if Earth disappeared we'd go with it?

If the Earth disappeared, the air would dissipate into space, and we would quickly suffocate. We would then freeze solid very quickly. There are very little gas particles in space, and although the ones that are there are moving very quickly, they are too few to cause any sort of heating. Therefore, unless you are very close to the Sun, it is extremely cold. So our bodies would float around in space as frozen human ice cubes, just orbiting the Sun in roughly what was Earth's orbit. I would imagine that over the course of millions of years, the intense radiation from the Sun and space environment (small particles, meteorites hitting us, etc) might make our bodies begin to slowly fall apart or disintegrate and eventually, over the course of billions of years, we would slowly become space dust. 

If the Earth disappeared (poof) the air would probably all go to.  We would only have a minute or two to move anywhere. (Mass or where ever)

read revelations in KJV bible it says what would and is going to happen bro! God will destroy this earth, so it will be replaced basically!