competition

• a habitat is the place where an organism lives
• a population is all the organisms of one species living in a habitat
• a community is the populations of different species living in a habitat
• abiotic factors are non-living factors of the environment
• biotic factors are living factors of the environment
• an ecosystem is the interaction of a community of living organisms with the non-living parts of their environment
• organisms compete for resources to survive
• plants need light and space, as well as water and mineral ions from the soil
• animals need space, food, water and mates
• in a community, each species depends on other species for things such as food, shelter, pollination and seed disperal - this is called interdependence
• the interdependence of all the living things in an ecosystem means that any major change in the ecosytsem can have far-reaching effects