Ecosystems can range in size from small to large. They contain biotic factors such as living things like tigers, plants, bacteria, and abiotic non-living things like weather, soil, rocks, sunlight and wind. Temperature affects the density of substances in freshwater environments and impacts how easily animals can travel. An organism is a living thing that can act independently, while a population is a group of the same species in an area. A community contains interacting populations and the abiotic environment they reside in. An ecosystem includes both biotic and abiotic components. The biosphere encompasses all life on Earth and can be divided into regional ecosystems. Evolution is the genetic change in populations over generations, influenced by natural selection

1. Ecosystemslarge Small to

2. Biotic: living thingsEx- tiger, venus fly trap, bacteria, fungi, antsAbiotic: nonliving thingsEx- weather, soil, rock, sunlight, windTemperature affects the density of substances, and changes in the density of water means more or less resistance for animals who are travelling in the freshwater environment.Biotic vs. Abiotic

3. Organism- Species - a class of plants or animals whose members have the same main characteristics and are able to breed with each otherThe organism panda, are an endangered species. Organisma living thing that has (or can develop) the ability to act or function independently

4. Population- group of individuals in the same area, species and time Diversity within a population- Pacific OceanA population can become more diverse by immigration or emigration.A population can become less diverse by selective breeding or fragmentation .Diversity within a population is good because a change in environment cannot kill everyone or a disease won’t kill species at once.Population

5. Community Community- a group of interacting organisms sharing an environmentBiodiversity- variety of all forms of life, from genes to species, through to the broad scale of ecosystems Communities with more biodiversity can signify that the area is simply easier to live in. One thing that can cause a high biodiversity is low pollution levels. A community consists of the abiotic environment and the populations of living organisms that reside in that environment.

6. Ecosystem- groups of population including nonliving A community doesn’t include nonliving like an ecosystem does.A ecosystem can fragment by less random mating which causes more inbreeding, highways or weather change.Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play.Ecosystem

7. Biosphere-part of planet where life can live.Relatively thin life-supporting stratum of the earth's surface, extending from a few miles into the atmosphere to the deep-sea vents of the oceans. The biosphere is a global ecosystem that can be broken down into regional or local ecosystems, or biomes.3% of water is fresh 97% of water is salt 30% landBiosphere

8. EvolutionEvolution-change in the genetic material of a population of organisms through successive generationsNatural selection- process by which heritable traits that make it more likely for an organism to survive and successfully reproduce Selective breeding- process of breeding plants and animals for particular genetic traitsHow an organism envolved