Organism Interaction
Balance
Disturbances
100
The organism that is helped is called:
parasite
100
All plants and animals need these: (name 3)
food, water, living space, shelter, light, and air
100
Name three different disturbances that effect an ecosystem:
Tornado, Hurricane, Fire, Flood, etc.
200
Populations in ecosystems change naturally as the amount of _______ changes
resources
200
How are balanced ecosystems constantly changing?
organisms are born; they live, die, and then decompose.
200
The process of gradual change from one community of organisms to another is called:
succession
300
When two or more species must use the same limited resources, _____ occurs
competition
300
Plants put oxygen back into the ecosystem through the process of:
photosynthesis
300
Populations of some species have been reduced so much that they are in danger of becoming:
extinct
400
Name one cause of competition
living space, food, shelter
400
Why do chipmuncks in the Great Smoky Mountains survive?
Their needs are met in that environment
400
How can fires effect an ecosystem positively?
It can help clear away dead and dying plant matter, making more room for new plants to grow
500
__________________ can make it easier to obtain food or stay protected.
Living in groups
500
A meadow has too many rabbits. What would help balance this ecosystem?
more foxes that eat rabbits
500
__________________ are substances that are very harmful to humans and other organisms.
Hazardous Wastes
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