simple definitions

• define a habitat

  the place where an organism lives
• define population

  all the organisms of one species living in a habitat
• define community

  the populations of different species living together in a habitat
• abiotic factors

  non-living factors of the environment
• biotic factors

  living factors of the environment
• Define ecosystem

  the interaction of a community of living organisms with the non living parts of their environment
• Organisms compete for resources to survive
• Name 7 abiotic factors.

  moisture level

  light intensity

  temperature

  carbon dioxide levels

  wind intensity and direction

  oxygen levels

  soil pH and mineral content
• Name 4 biotic factors.

  New predators

  competition

  new pathogens

  availability of food
• Any change in environment can have knock-on effects