Mercury Cycle
Carbon Cycle
Nitrogen Cycle
Phosphorus Cycle
Human Impact
100
Organisms that convert elemental mercury into methylmercury.
What is bacteria?
100
Another name for petroleum products, such as coal and natural gas that formed from the remains of living organisms in the geological past.
What is fossil fuels?
100
The atmosphere is made up of ____% Nitrogen.
What is 78%?
100
Phosphorus is mainly found in this form.
What is rock?
100
An anthropogenic source of mercury.
What is burning coal?
200
A form of mercury that accumulates in fish.
What is methylmercury?
200
The process that forms carbohydrates and uses CO2 from the atmosphere.
What is photosynthesis?
200
During this process, nitrogen in the atmosphere is turned into ammonia by plant nodules.
What is nitrogen fixation?
200
Rocks break down due to wind and rain in this process and release phosphorus.
What is weathering?
200
Humans increase CO2 levels in the atmosphere through this activity.
What is burning fossil fuels?
300
Mercury can be washed out of the fish that you consume. True or False
What is false?
300
The process in the deer that obtains the energy stored in carbohydrates and releases CO2 into the atmosphere.
What is respiration?
300
During nitrification, ammonia is turned into these two molecules.
What are nitrites and nitrates?
300
Too much phosphorus in water leads to excessive plant growth and decreased levels of dissolved oxygen. This process is called____________________.
What is eutrophication?
300
Nitrogen, phosphorus, and potassium can be found in this product used in farming.
What are fertilizers?
400
Type of fish that can have larger amounts of mercury and should be avoided or limited by pregnant women.
What is fish higher up on the food chain, such as tuna or swordfish?
400
Name three types of fossil fuels.
What is oil, coal and natural gas?
400
Nitrogen is returned into the atmosphere during this process.
What is denitrification?
400
True or False: There is phosphorus in the atmosphere.
What is false?
400
The reason why nitrogen cycling is important in a fish tank.
What is it removes ammonia, which is toxic to fish?
500
Mercury passes through the placenta and affects this system in unborn animals.
What is nervous system?
500
When animals and plants die, microorganisms use this process and release carbon dioxide into the atmosphere.
What is respiration or decomposition?
500
Waste is converted back into ammonia during this process.
What is ammonification?
500
Rocks containing phosphorus are brought to the surface through this process.
What is uplifting?
500
Run-off that contains an too much fertilizers can cause this in water sources.
What is an algal bloom or excessive algae growth?