Im not sure how to interpret the idea from my head into words but i will try my best. Say everyone was holding hands in a straight line all the way around earth so that they joined. wouldnt that mean, taking into consideration the earths shape, that the line would always be in the centre of the earth?

furthermore if there was another line of people holding hands but lets say they was 1000 miles for example away, (thinking of for example a football, if you had a band in the middle of the football the diametre could for example be 30cm where as if the band was placed further apart it could be 15cm as it would be near the edge; could this idea be the same if the football was earth, and the bands where people?) would the people 1000 miles away contain for example 10 million people where as in the middle it would be 100 million because of a longer distance to travel? tell me if im talking nonsence or if you understand my concept?

In SA Sutherland to be precise we have an observatory, i asked why is it there and say not in the middle of the Free state, i was told it is in Sutherland because it is seismically one of the quietest places on earth, What does this mean?? do they mean there is never any earthquakes? if so surely there are many other possible places in SA it could have gone.

is global warming our fault; caused by carbon or is it just that the earth has been warming up ever since the ice age?

Why 'on earth' do we see only one side of the moon ?

If we are hit by a CME what may happen? Also, can we predict them and how? What can we do to protect ourselves?

Changing as few as possible of the laws of physics, what would be the effect on life on earth - particularly human life - if there was no such thing as snow?

If we consider thermodynamics and its law that heat travels from hot to cold, I was curious as to how or what occurs when sunlight is travelling to Earth. The gap between the Sun and the Earth is effectively a vacuum and also the low pressure at high altitudes mean that it is very cold, surely the heat should be dispersed by then and not reach sea level.

I would like to know how we still manage to feel the heat.

Thank you

Say there was a tunnel that went through the centre of the Earth that came out on the exact opposite side to the entrance. If you jumped down it, would you have the momentum to fly out of the other side, or would you be pulled towards the Earth's centre of mass and be crushed? This is assuming of course that the person will not burn :P