Much of Earth's Sulfur supply is found in these substances. Think of what a Geologist studies.
What are rocks and minerals?
100
We mine large amounts of phosphate rocks in order to create this, an anthropogenic source of surface runoff.
What are commercial inorganic fertilizers?
100
Being Earth's most abudant element, Nitrogen makes up about this much of the troposphere.
What is 78% of the volume of the troposphere?
100
The carbon cycle is based on this, which makes up .038% of the volume of the troposphere.
What is Carbon Dioxide?
100
Another name for the water cycle, this process deals with the distribution, purfication, and recycling of Earth's fixed supply of water.
What is the Hydrologic Cycle?
200
This is a natural form of sulfur, a highly poisonous gas that has the distinct odor of rotten eggs. Commonly spewed from Volcanoes and from materials in swamps and bogs.
What is Hydrogen Sulfide?
200
We reduce phosphate levels in tropical soil by doing this, something Brazil has seemed to be a huge culprit of.
What is the cutting down of tropical forests?
200
Nitrogen is found in many places and in many forms but is probably most important in this substance. It's shape is defined as having a double "" shape.
What is DNA?
200
The carbon cycle ultimately effects all life on earth and the areas they live because it constantly does this to earth's temperatures.
What is lowers and raises them?
200
Oceans contribute about 84% of this to the atmosphere, it is considered to be one of the four main greenhouse gases.
What is Water Vapor?
300
These particales of Sulfate come into the atmosphere from sea sprays, dust storms, and these. Smokey usually has a huge problem with these.
What are forest fires?
300
We add more phosphates to the water supply by increased runoff of animal wastes and fertilizers and this source of recyclable water.
What are discharges from sewage treatment systems?
300
This process is responsible for the creation of Ammonia in the soil and helps provide nutrients for many plants.
What is Nitrification?
300
This process breaks down glucose in most producers, consumers, and decomposers. It converts the glucose back into CO2 where it is then used again and again.
What is Aerobic Respiration?
300
Sometimes the freshwater coming back to the earth in various forms can be frozen and turned into these, some even have national parks.
What are glaciers?
400
Sulfur is found in this fossil fuel, one of the largest users of it are the USA, China, and Russia.
What is Coal?
400
Phosphates can be lost from the cycle for long periods of time when it is washed into the oceans and deposited as this on the ocean floor.
What are sediments?
400
Much of our Nitrogen Oxide pollution is caused by this source. You can thank many fast food chains for it.
What are Livestock wastes in feedlots and commercial inorganic fertilizers?
400
One of the major human effects on the carbon cycle is this, usually involing the creation of clear cut forests.
What is the cleaing of vegtation faster then it can regrow?
400
One major effect humanity has had on the water cycle, even with this many people still fight over it.
What is withdrawing large quantities of water?
500
If man hadn't created such an excess of sulfur in the atmosphere by burning fossil fuels, it would stay tied up in rock for millions of years until these processes release it.
What is erosion and weathering?
500
Plants obtain phosphorus from the soil in this form. The same form that nitrogen takes when it is absorbed.
What are Phosphorus Ions?
500
We remove nitrogen from topsoil by this process, a practice invented thousands of years ago for agriculture.
What is Irrigation?
500
One of our favorite results of messing with the carbon cycle, this phenomenon is the reason that The Day After Tomorrow was made.
What is Global Warming?
500
This effect is more of an indirect one, as we clear vegetation and cover the land with impentrable surfaces(such as roads and parking lots) the water gains more of this substance.