Unit B: Looking at Ecosystems
Chapter 1: Ecosystems
Chapter 1 Introduction
Did you ever stop to think why living things live where they do? A maple tree wouldn't grow well in a desert. An elephant probably wouldn't survive in the Arctic. All living things have adaptations to meet their needs in areas where they are found. If the areas change, some living things may find it hard to survive.
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Chapter 1, Lesson 1: What are systems?
Chapter 1, Lesson 2: What Makes Up an Ecosystem?
Summary
An ecosystem is made up of groups of living things and their environment. An ecosystem may include plants and animals, and nonliving parts such as sunlight, soil, air, water, and temperature. Organisms of the same species form populations. A community is made up of populations of different species in an ecosystem. Click on the button below to watch and interact with a video. |
Chapter 1, Lesson 3: What are Habitats and Niches?
Summary
An environment that meets the needs of an organism is called its habitat. An organism's niche is its role within the habitat. As organisms in an ecosystem carry out their roles, they can affect both living and nonliving parts of the ecosystem. Click on the button below to watch and interact with a video. |
Chapter 1, Lesson 4: What are Tropical Rain Forests and Coral Reefs?
For Review