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Ecosystems Organisms and Environments Lesson 1 TEKS 5.9A, 5.9C, 3.9A, 3.9C Oh, Deer!!!!! Game!!!!!!! • Living things depend on each other and on the nonliving things in their environment in order to thrive. • Changes in the environment cause changes to living organisms. Habitat • The specific environment where an organism lives. meadow pond river tree soil Species • A group of organisms that can produce offspring that are like themselves Population • All the organisms of the same species that live in the same area at the same time. Community • Populations of different species that live in the same area at the same time. Ecosystem: all the populations of organisms and the Nonliving things in an environment, and the interaction among them. Nonliving things: Soil Water Oxygen Carbon Dioxide Sunlight Living things: Plants Animals Can be small (pond). Can be large (desert). Ecosystem Special Ecosystems Biome • One of the six major land areas of the world that is home to specific plant and animal populations and is defined by its climate. Tropical Forest • • • • Warm temperatures Rainy climate Many trees and other plants Many animals Have you seen Tarzan? Desert • Very little rainfall or snowfall • Can be hot temperature or cold temperature • Few plants or animals Have you seen Rango? Grasslands • • • • • Mostly flat land Covered with tall grasses Few trees Warm climate Not as dry as desert Have you seen Dances with Wolves? Deciduous Forest • QuickTime™ Has four seasons and a Cinepak decompressor • Warm and Cold winter are needed to seesummer this picture. • Trees lose their leaves in autumn • Many plants and animals QuickTime™ and a decompressor are needed to see this picture. Taiga • • • • Evergreen forest: fir and pine trees Long, cold winter Short, mild summer Elk, moose, bears, are some animals QuickTime™ and a decompressor are needed to see this picture. Have you seen Open Season? Tundra • • • • • Flat, open ground Always frozen and cold all year long Few plants: mosses, lichens, shrubs Too harsh for trees Polar bears, arctic hares, arctic fox, musk ox QuickTime™ and a decompressor are needed to see this picture. Vocabulary • Habitat: the specific environment where an organism lives • Species: a group of organisms that produce offspring like themselves • Population: All the organisms of the same species that live in the same area at the same time • Community: Populations of different species that live in the same area at the same time • Ecosystem: all the populations of organisms and the nonliving things in an environment, and the interaction among them • Biome: One of the six major land areas of the world that is home to specific plant and animal populations and is defined by its climate • Drought: a period of very little rainfall • Flood: an overflow of water onto land that is normally dry • Thrive: to grow in a strong and healthy way • Perish: to die