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Chapter 6
Grade 5 Life Science- Ecosystems and Change
| Question | Answer |
|---|---|
| What is a community? | a group of populations that live together |
| What is competition? | a kind of contest among populations that need to get a certain amount of food, water, and shelter |
| What is symbiosis? | a relationship between different kinds of organisms |
| What are predators? | an animal that kills and eats other organisms |
| What is prey? | an animal that is eaten by a predator |
| What is succession? | a gradual change in the kinds of organisms living in an ecosystem |
| What is extinction? | the death of a species |
| What is pollution? | a waste product that harms living things and damages an ecosystem |
| What is acid rain? | a mixture that forms when chemicals from burning fossil fuels mix with water vapor in the air |
| What is a habitat? | an area where an organism can find everything to survive |
| What is conservation? | the use of less of a resource to make the supply last longer |
| What is reclamation? | the process of cleaning and restoring a damaged ecosystem |
| What is the difference between a population and a community? | A population is a group of only ONE type of animal, a community is a group of many populations |
| True or false? Symbiosis is the same as competition. | False |
| What is mutualism? | two organisms benefit |
| What is commensalism? | one organism benefits |
| What is parasitism? | one organism benefits, the other is harmed |
| Why do many parasites eventually need a new host? | they kill the host |
| Place these items in order: grass, lichens, trees, bare rock | bare rock, lichens, grass, trees |
| Which term refers to the rebirth of a damaged ecosystem? | secondary succession |
| How can an ecosystem be destroyed? | fire, volcanic eruption, or human actions |
| What resources can be polluted? | water, air, soil |
| What are the main sources of pollution? | fertilizers, burning fossil fuels, pesticides, toxic waste |
| What are the main ways people damage ecosystems? | building fences, cutting forests, filling in wetlands, introducing new plants and animals |
| What are three ways in which people can conserve resources? | reduce, reuse, recycle |
Created by:
KAUELIGHT
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