Human Activities
Ecological Succession
Primary Succession
Secondary Succession
both units
100
Leak from the buried gas tank
What is contaminating the groundwater?
100
_________ are outside forces that cause a response in an organism.
What is External Stimuli?
100
__________ are the first organism to arrive and colonize the bare rock.
What is Lichens?
100
___________ would most likely cause an ecological succession in South Texas.
What is Drought?
100
From where do many comunities get their water?
What is groundwater?
200
What is the source of contamination in a cattle stockyard?
What is cattle waste?
200
With any form of ecological succession, what happens to the soil?
What is becomes thicker?
200
A lichen can be described as an effective _______ ______!
What is pioneer species?
200
Secondary succession can be identified when this is present.
What is a layer of soil?
200
A small pond, puddle, fallen tree, grass in the football field, etc that can support life can be considered a __________.
What is microhabitat?
300
The amount of fresh water available is ______.
What is 3%?
300
What is the gradual and predictable transition of organisms that make up a community after a disturbance?
What is Ecological Succession?
300
Why would a simple ecosystem with few plants and animals be more likely to change.
What is the loss of 1 organism can cause the ecosystem to lose its equilibrium?
300
How long does secondary succession take?
What is 5-15 years?
300
One advantage to the model with the underground water balloon was that it used ________ instead of dangerous gasoline.
What is colored water?
400
The best way to ensure that old oil wells do not contaminate the groundwater would be to...
What is seal off the abandoned oil well with concrete?
400
Why are forest fires good for an ecosystem?
What is Ash provides nutrients to the soil?
400
Can there be secondary succession before primary succession? Explain your answer
What is yes, in case of a volcanic eruption?
400
What are 3 disturbances that affect the equilibrium of an ecosystem?
What is Earthquake, Flood, Tsunami, Hurricane, etc?
400
When a pond ecosystem experiences succession over a 100-year period, _________ ___________ will occur.
What is sediment deposition?
500
What are 3 ways in which human activities contaminate ground and surface water?
What is oil spills, dust cropping, landfills, over use of fertilizer, septic tanks, to name a few?
500
The last stage of succession is ________ _________ when an ecosystem reaches equilibrium and can support a variety of life.
What is Climax Community?
500
The study of the relationships between living things and their environments.
What is Ecology?
500
Why is it easier for secondary succession to occur?
What is it already has a thick layer of soil?
500
The roots of a plant laying on its side will grow downward due to the force of _______.
What is gravity?
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