How many years does it take for an amount of water equal to the entire volume of the ocean to cycle through hydrothermal vents?
W)1000 years
X) 100,000 years
Y) 10 million years
Z) 1 billion years
Answer: Y
How many years does it take for an amount of water equal to the entire volume of the ocean to cycle through hydrothermal vents?
W)1000 years
X) 100,000 years
Y) 10 million years
Z) 1 billion years
Answer: Y