The carbon cycle is one of the main cycles in nature, the carbon cycle produces nutrients and energy in plants for animal consumption. The cycle also is responsible for all oxygen production.
The Carbon Cycle
- Carbon moves from the atmosphere to plants.
- Carbon moves from plants to animals.
- Carbon moves from plants and animals to soils.
- Carbon moves from living things to the atmosphere.
- Carbon moves from fossil fuels to the atmosphere when fuels are burned.
- Carbon moves from the atmosphere to the oceans.
Carbon is the basic building block of life . This is the reason carbon dating is effective, all living organisms contain carbon. Also, carbon is so important to life because virtually all molecules in the body contain carbon. Carbon can bond to four other groups around it , and to other carbon molecules.
The carbon in CO2 is incorporated into plants by photosynthesis, then into animals by consuming organisms, and returned to the air as CO2 from respiration. Cellular carbon is returned to the soil through waste and dead organism decay. Earth's major reservoir of carbon in the form of carbon dioxide.
Humans cause environmental problems by influencing the carbon cycle in two ways. The carbon dioxide levels in air are now so high, that the uptake by plants and oceans is not fast enough. Carbon dioxide is a greenhouse gas. This means that increasing carbon dioxide levels in air support the greenhouse effect.
Combustion occurs when any organic material is reacted (burned) in the presence of oxygen to give off the products of carbon dioxide and water and ENERGY. The organic material can be any fossil fuel such as natural gas (methane), oil, or coal.
The biggest changes in the land carbon cycle are likely to come because of climate change. Carbon dioxide increases temperatures, extending the growing season and increasing humidity. The warming caused by rising greenhouse gases may also “bake” the soil, accelerating the rate at which carbon seeps out in some places.
The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone.
Carbon has the ability to form very long chains of interconnecting C-C bonds. This property allows carbon to form the backbone of organic compounds, carbon-containing compounds, which are the basis of all known organic life. Nearly 10 million carbon-containing organic compounds are known.
Carbon is stored on our planet in the following major sinks (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite and
Chemical properties of carbon - Health effects of carbon - Environmental effects of carbon
| Atomic number | 6 |
|---|
| Atomic mass | 12.011 g.mol -1 |
| Electronegativity according to Pauling | 2.5 |
| Density | 2.2 g.cm-3 at 20°C |
| Melting point | 3652 °C |
Carbon is a non-metal element. At room temperature it is in a solid state. Carbon exists in different forms, including graphite, diamond and graphene.
If there were an interruption in the carbon cycle, life on Earth as we know it would be in danger of being disrupted. Without carbon dioxide, the plants would not do as well, and potentially die, creating a problem for all the animals on the planet, Since they have to breathe oxygen to live.
The carbon cycle is based on carbon dioxide (CO2), which can be found in air in the gaseous form, and in water in dissolved form. Terrestrial plants use atmospheric carbon dioxide from the atmosphere, to generate oxygen that sustains animal life.
Exposure to CO2 can produce a variety of health effects. These may include headaches, dizziness, restlessness, a tingling or pins or needles feeling, difficulty breathing, sweating, tiredness, increased heart rate, elevated blood pressure, coma, asphyxia, and convulsions.
Humans interact with the carbon cycle on many levels. When we exhale, we exhale carbon in the form of carbon dioxide. When we die and our bodies decompose, carbon is released back into the soil. The burning of fossil fuels for electricity and transportation moves carbon through the carbon cycle.
Start With PlantsPlants are a good starting point when looking at the carbon cycle on Earth. Plants have a process called photosynthesis that enables them to take carbon dioxide out of the atmosphere and combine it with water. Using the energy of the Sun, plants make sugars and oxygen molecules.
Key Points on Carbon CycleCarbon cycle explains the movement of carbon between the earth's biosphere, geosphere, hydrosphere and atmosphere. Carbon atoms are then released as carbon dioxide when organisms respire. The formation of fossil fuels and sedimentary rocks contribute to the carbon cycle for very long periods.
The carbon cycle moves atmospheric carbon into plants, and thus animals when they consume plants. Water provides the ingredients needed for plants to do photosynthesis and remove carbon dioxide. The oceans are another important carbon sink.
