Three quarter's of the planet's surface is covered with _____

The green colour of the earth shows _____

_______ was the first to sail around the earth.

The Moon takes _____ days to complete one revolution around the Earth.

The earth is surrounded by a blanket of air called _____

The movement of the Earth around Sun in an elliptical orbit is called _____

The axis of the earth is slightly _____

Earth is at least ____ billion years old.

The flat bottom is called the _____ pole

The rotation of the Earth on its causes ____ and ____