We finished our unit on plate tectonics a few weeks ago. Recently we've been talking about the abiotic and biotic factors that affect ecosystems. Students learned that abiotic factors are things that are non-living (i.e. water, topography, pH, sunlight, temperature, wind, space, etc.). Biotic factors are living things (i.e. bacteria, plants, decomposers, predators, prey, etc.). They interact in a variety of ways. For example, an overpopulation of cows grazing in a grassland causes the plants to die, the roots to shrivel, and for erosion of the soil to occur.
Next week we will be talking about extinctions, and students will be designing their own zoo enclosures as they research the different biomes and the requirements for different animals.
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