The process by which terrestrial organisms convert ammonia back into nitrates and nitrites and then into nitrogen gas and nitrous oxide gas- that rise into the atmospher
Who are the main producers in the marine food web?
Warming of the atmosphere, causing ice sheets to melt, exposing the soil beneath, which absorbs more heat, which then causes more ice to melt, which causes more soil to be exposed, etc. This is an example of?
The largest sink (reservoir) for phosphorus is:
What is the chemical formula for ammonia?
Dissolved oxygen be higher in what type of water?
Nitrogen found in the troposphere is found as this form
People want to save the environment because it is beautiful. This is what type of justification?
Carbon is most commonly found in the ocean as this ion:
Oxygen depleted zones of the oceans, such as the one at the mouth of the Mississippi RIver, are most likely caused by:
The largest user of freshwater worldwide is:
Which element is considered to be the limited factor for terrestrial plant growth?
What organism regulates the flow of nitrogen in and out of its largest reservoir?
Process by which plants absorb nutrients through their roots
What is the smallest reservoir of the global hydrologic cycle?
Which nutrient cycle does not have an atmospheric component?
The biggest contributor to excess nitrates in waterways is:
Nitrogen fixation will take place in field that are planted with which type of plant?
Approximately how much Carbon Dioxide does the atmosphere contain?
Seawater changes pH from 6 to 5. This change is a factor of:
What process can decrease the amount of carbon dioxide in the troposphere?
Which element is considered to be the limiting factor for phytoplankton growth?
In the term, 'Phytoplankton', the prefix 'phyto' means what?
Which nutrient cycle is mostly responsible for photochemical smog?
What is the chemical composition of nitrate?
