Biotic and Abiotic factors

• biotic vs abiotic factors

  biotic : living factors

  abiotic factors : non living factors
• examples of abiotic factors

  space

  nutrients

  light

  oxygen

  temperature

  water
• examples of biotic factors

  predators

  competition for resources
• parasitism is when one organism benefits at the expense of another
• mutualism is when two organisms where both benefit from the relationship
• commensalism is a relationship between two organisms where one benefits and the other is not harmed
• Carbon

  • The main part of all living things
  • The basis for fats, carbs, nucleic acids, protiens
  • component of fuel - coal, gas
• carbon cycle

  1. plants take in carbon dioxide, and put out oxygen
  2. carbon dioxide decomposes dead plants and animals
  3. they turn into fossil fuels
  4. they are mined and turned into greenhouse gases
• nitrogen cycle

  nitrates in the soil feed plants by being absorbed by roots

  animals die and excrete waste

  they turn into nutrients

  decomposers decompose them into nitrogen