lunes, 25 de octubre de 2010

Life Cycle

Life Cycle

Introduction: The life cycle is a project funded by the EUPublic Health Programme, aligned to its overall goal of improving the health of EU citizens by fostering more physically active lifestyles. To learn more about the life cycle project, partner countries, target groups and our latest news, please feel free to browse our website or contact us directly.

The life cycle have 3 types :

  • Water Cycle: also known as the hydrologic cycle or H2O cycle, describes the continuous movement of water on, above and below the surface of the Earth. Water can change states among liquid, vapour, and ice at various places in the water cycle. Although the balance of water on Earth remains fairly constant over time, individual water molecules can come and go.The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, runoff, and subsurface flow. In so doing, the water goes through different phases: liquid, solid, and gas.
  • Carbon Cycle: is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. It is one of the most important cycles of the earth and allows for carbon to be recycled and reused throughout the biosphere and all of its organisms.
  • Nitrogen Cycle:  is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out via both biological and non-biological processes. Important processes in the nitrogen cycle include fixation, mineralization, nitrification, and denitrification. The majority of Earth's atmosphere (approximately 78%) is nitrogen, making it the largest pool of nitrogen. However, atmospheric nitrogen is unavailable for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.

lunes, 18 de octubre de 2010

Food Chains and food Webs

Food Chains and food Webs



Living things depend on each other for energy,like food chains and food web. In nearly all food chains, solar energy  is input into the system as light and heat, utilized by autotrophs in a process called photosynthesis. Carbon dioxide is reduced by being combined with water, producing glucose. water splintting produces hydrogen, but is a nonspontaneous reaction requiring energy from the sun. Carbon dioxide and water, both stable, oxidized compounds, are low in energy, but glucose, a high-energy compound and good electron donor, is capable of storing the solar energy. This energy is expended for cellular processes, growth, and development. The plant sugars are polymerized for storage as long-chain carbonhydrates, including other sugars, starch, and cellulose.
 Food chains are overly simplistic as representatives of the relationships of living organisms in nature. Most consumers feed on multiple species and in turn, are fed upon by multiple other species.
For a snake, the prey might be a mouse, a lizard, or a frog, and the predator might be a bird of prey or a badger. The relations of detritivores and parasites are seldom adequately characterized in such chains as well.
A food web is a series of related food chains displaying the movement of energy and matter through an ecosystem. The food web is divided into two broad categories: the grazing web, beginning with autotrophs, and the detrital web, beginning with organic debris. There are many food chains contained in these food webs.
In a grazing web, energy and nutrients move from plants to the herbivores consuming them to the carnivores or omnivores preying upon the herbivores. In a detrital web, plant and animal matter is broken down by decomposers, e.g., bacteria and fungi, and moves to detritivores and then carnivores.

Living Things and their Environments

Living Things and their Environments


The living things and nonliving things interact in an ecosystem. An ecosystem is all the living and nonliving things in an area interacting with each other. Ecology is the study of how all these things interact to survive. all the ecosystem have the same part. The biotic factor Biotic components are the living things that shape an ecosystem. They are, any living component that affects another organism. Such things include animals which consume the organism in question, and the living food that the organism consumes.The abiotic factor are non-living chemical and physical  factors in the environment. Abiotic phenomena underlie all of biology. Abiotic factors, while generally downplayed, can have enormous impact on evolution. Abiotic components are aspects of geodiversity.The environment of the animals, encompasses all living and non-living things occurring naturally on Earth or some region there of. It is an environment that encompasses the interaction of all living species.The concept of the natural environment can be distinguished by components.

Energy Resources

Energy Resources


Introduction: The energy resources is everything that could be used by society as a source of energy. Are discovered to be hydro, solar, wind, biomass, geothermal, coal, crude oil, natural gas, and ocean-wave motion and are used to produce power. Are substances chemically classified this way because of their potential ability to produce energy, mostly from the covalent bonds of carbon atoms.


The heat can be used to generate electricity. The heat is used to boil water and turnit into steam. The steam is trapped, and pressure builds up. Then the steam is released. The steam is directed at a big, pinwheel like turbine. When the steam hits the turbine, it causes a spin. The spinning turbine turns a generator to make electricity. All fuels have advantages and disadvantages.
Sources of energy other than the burning of fossils fuels are called "alternative energy sources".Here are some alternative energy sources
  • Modern Waterwheels:any whitewater rafter can tell you that running water has a lot of energy, that energy can be harnessed to do work using waterwheels.
  • Harnessing the wind: wind, or moving air, can also spin a wheel
  • Earth's Furnace: the Earth's interior is very hot. The most common evidence of that heat is simply hot water .