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 |