6. Animals and plants needing water to survive shows which two systems interacting? a. Hydrosphere and Geosphere b. Mesosphere and Biosphere c. Atmosphere and Biosphere d. Biosphere and Hydrosphere 7. Which earth system involves mountains and volcanoes? a. Atmosphere b. Geosphere c. Biosphere d. Hydrosphere 8. Water rushing down from the mountain is an example of which two systems interacting? a. Geosphere and Atmosphere b. Biosphere and Atmosphere c. Geosphere and Hydrosphere d. Mesosphere and Biosphere 9. How do the biosphere and the hydrosphere interact? a. air contains water b. volcanic ash can enter the atmosphere c. living things need water to survive d. these two spheres do not interact od ng the thinnest layer and composed mainly of silicon and all​