Question

Which of these is not a cycle studied by scientists?

O carbon
o hydrogen
O
rock
O
water

Answer 1

Rock

Step-by-step explanation:

There is a carbon cycle that scientists have studied that shows how carbon is reused in an ecosystem so carbon is not the answer.

There is a hydrogen cycle that scientists have studied that shows how hydrogen is exchanged between biotic and abiotic sources.

There is no rock cycle

There is a water cycle that has been studied by scientists that shows the movement of water within the earth and the atmosphere

The answer is Rock