Living Systems: Ecosystems
Points to Remember:
1 Living things and the nonliving factors in their surroundings make up an ecosystem. Adaptations allow an organism to survive in a particular type of ecosystem.
2 Ecological succession is a natural process by which one community is replace by another community in an orderly, predictable sequence.
3 Green plants use sunlight to make their own food. They are called producers. Animals depend on other organisms for food. They are called consumers. All organisms get their energy directly or indirectly from the sun.
4 Decomposers are organisms that break down the remains of dead plans and animals. Decomposers return nutrients to the environment.
5 Producers, consumers, and decomposers may be linked in a sequence called a food chain. Disturbing any part of a food chain affects other organisms in the food chain.
6 There is a continual exchange of materials between an organism and its environment: these materials include food, water, oxygen, and wastes.
Points to Remember:
1 Living things and the nonliving factors in their surroundings make up an ecosystem. Adaptations allow an organism to survive in a particular type of ecosystem.
2 Ecological succession is a natural process by which one community is replace by another community in an orderly, predictable sequence.
3 Green plants use sunlight to make their own food. They are called producers. Animals depend on other organisms for food. They are called consumers. All organisms get their energy directly or indirectly from the sun.
4 Decomposers are organisms that break down the remains of dead plans and animals. Decomposers return nutrients to the environment.
5 Producers, consumers, and decomposers may be linked in a sequence called a food chain. Disturbing any part of a food chain affects other organisms in the food chain.
6 There is a continual exchange of materials between an organism and its environment: these materials include food, water, oxygen, and wastes.