A.The present population on earth is fourteen billion.B.Water is recycled every seventy million years.C.The planet earth travels around the sun at 18 miles per second.D.The earth is compared to a spaceship because they both travel around the sun.
A.The present population on earth is fourteen billion.
B.Water is recycled every seventy million years.
C.The planet earth travels around the sun at 18 miles per second.
D.The earth is compared to a spaceship because they both travel around the sun.