Match each activity with the sphere to which it adds carbon or co2.
tiles
a. photosynthesis
b. burning things
c. respiration of marine life
d. burying organisms
pairs
1. geosphere
2. hydrosphere
3. biosphere
4. atmosphere

A=3  B=4  C=2  D=1, Burning things would increase the C02 in the atmosphere. Burying things would influence the dirt, rocks and earth in the area. Photosynthesis affects the biosphere as it allows plants to grow and spread. And the breathing of marine life would affect the water the marine life lives in (releasing Co2 into the water and what not)

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

six grader is what i am ssorry