Give me 2 examples of how changes in one sphere caused a change in a different sphere biosphere, geosphere, cryosphere, atmosphere, or hydrosphere. Here are my examples: because plants in the ocean produced oxygen, the amount of oxygen on our planet increased dramatically The oxygen then formed a protective ozone layer around Earth. This allows living things to start living on land because they were now shielded from some of the sun's harmful rays.

#1 The biosphere (plants in the ocean) affected the evolution of the atmosphere (increased oxygen forming the ozone). #2 The atmosphere (protective ozone) affected the evolution of the biosphere (life can finally start living on the land, not just in oceans).