What process accounts for the fact that the water on Earth now is the same water that has been on Earth for 4 billion years?
A. Nitrogen Cycle
B. Water Cycle
C. Kreb’s Cycle
D. Life Cycle
Answer:B
What process accounts for the fact that the water on Earth now is the same water that has been on Earth for 4 billion years?
A. Nitrogen Cycle B. Water Cycle C. Kreb’s Cycle D. Life Cycle