Drawing the Carbon Cycle The many processes by which carbon is transferred from one store to another are collectively known as the carbon cycle During the carbon cycle, carbon is present in both or...
Industrialisation & Increased Carbon Dioxide Atmospheric carbon dioxide levels have fluctuated throughout Earth's history due to events such as volcanic eruptions and the weathering of limeston...
Greenhouse Gases & Climate Patterns Greenhouse gases absorb infrared radiation emitted by the earth, causing the atmosphere to warm Without greenhouse gases, the earth would be much colder The ...
The Main Greenhouse Gases When radiation from the sun hits the earth, it is radiated back from the earth's surface as long-wave radiation A greenhouse gas is a gas that absorbs this re-radiated rad...
Formation of Peat Under normal conditions the tissues of dead organisms are completely broken down by decomposers known as saprotrophs and detritivores These decomposers require specific conditions...
Methanogenesis Methane (CH4) is a simple hydrocarbon It is present as a gas in the atmosphere, and underground, and is the main component of natural gas fossil fuel Methane can be produced by the n...
Respiration & Carbon Dioxide All living cells carry out some form of cellular respiration, from bacteria, to plants, to animals Many organisms carry out aerobic respiration Aerobic respiration ...
Carbon Fixation Carbon is present in the atmosphere in the form of carbon dioxide gas Carbon is taken out of the atmosphere by plants to be used in photosynthesis Plants are autotrophs Autotrophs u...
Pyramids of Energy Pyramids of energy illustrate the amount of energy contained within the biomass of organisms at each trophic level The length of each box, or bar, represents the quantity of ener...
