Unit 3- Science 3 Study Note

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Name Lesson 1 Summary Use with pp. 71–75 Lesson 1: What are ecosystems? Vocabulary environment everything that surrounds a living thing ecosystem all the living and nonliving things that interact with each other in a given area population all the living things of the same kind that live in the same place at the same time community all the populations that live together in the same place Places for Living Things Special Homes Each living thing needs a certain A habitat is where a living thing makes environment. An environment has living its home. It has everything that a plant or and nonliving parts. Plants, animals, and animal needs to live. It gives plants light, other living things are the living parts. The air, water, and a space to live. It also gives nonliving parts are the Sun’s rays, climate, them insects that pollinate the plants. The water, and soil. habitat gives animals food, water, shelter, We need the Sun’s rays to live. The Sun’s and a space to live. If any of these things rays make the air, water, and soil warm so are missing, the plants or animals may die we can live. Sunlight shines on the leaves of or move to a new habitat. plants. Plants need sunlight to make food. Climate shapes each environment. Climate Groups Within Ecosystems is the weather in a place all through the year. Coyotes live together in groups. A group For example, a place may have cold, wet of living things that are the same and live winters and hot, dry summers. together is called a population. Coyotes hunt Water and soil are important parts of squirrels. A community is all the populations each environment. Rain and snow fall. that live together in the same place. The Water goes into the soil. Each plant type coyotes, squirrels, and their habitat make up a needs a certain amount of water and a community. The populations in a community certain kind of soil. need each other for food and shelter. Parts of an Ecosystem Ecosystems Change The living and nonliving parts of an Ecosystems usually change over time. The environment work together. These parts make change starts when one part of the ecosystem © Pearson Education, Inc. 3 up an ecosystem. The living parts of an changes. For example, a habitat may get ecosystem need the nonliving parts to live. For more rain than usual. Plants will grow more. example, coastal redwood trees need sunlight, Ground squirrels will have more food. So the soil, and air. They also need a lot of water. population of ground squirrels will grow. The living parts of an ecosystem also The coyotes eat squirrels. So the coyotes depend on one another. For example, some will have plenty of food. The population of sea birds get fish from the ocean. Then they squirrels will go down. fly to land. They build their nests in the If there is less rain than usual, fewer redwood trees. plants will grow. There will be fewer squirrels. The coyote population will stay small or decrease. 20 Chapter 3, Lesson 1 Summary Quick Study

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