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(20 points)* use vocabulary you have learned from the unit, such as: biotic, abiotic, vegetation, diversity, ground cover, soil, plant life, pioneer species, organisms, climax community2. this photograph was taken in 1989, 9 years after mount saint helens erupted. compare this photo with the 1983 photo. (first picture) -what has changed? what looks different? -how do you think those changes might have come about? 3. this photograph was taken in 1994, 14 years after mount saint helens erupted. compare and contrast this photo with the previous two. (second picture) -what changes do you see in the biotic and abiotic factors? -do you believe it has reached a climax community? why or why not? 4. this photograph was taken in 2004, 24 years after mount saint helens erupted. compare and contrast this photo with the previous three. (third picture) -what changes do you see in the biotic and abiotic factors? -do you think it has reached a climax community?
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