Before manipulating any area of the hubbard brook forest, the researchers spent several years studying the natural watersheds of the forest to try to understand how nutrients move through the various living and nonliving components (reservoirs) of the ecosystem.

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).

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

where are there choices to this question?