BEAVER, ELK, and TREES in YELLOWSTONE PARK An Interactive PowerPoint Experiment.
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Transcript of BEAVER, ELK, and TREES in YELLOWSTONE PARK An Interactive PowerPoint Experiment.
BEAVER, ELK, and TREES in YELLOWSTONE PARK
An Interactive PowerPoint Experiment
Teachers – Before viewing the slide show, right click on the document below. Go to “Document Object” and select “Open”. Print out worksheet and have students complete while viewing the PowerPoint.
You will need to take data in order to analyze what is going on and to answer questions at the end of the lesson. Pay attention to what is happening to the population of beaver, aspen, willow, and conifers. As the years go by, mark with a plus (+) if the population increases, and a minus (-), if it decreases. LOW ELK POPULATION HIGH ELK POPULATION
Beaver Aspen Willow Conifer 1900
1910
1920
1930
1940
1950
1960
1970
Beaver Aspen Willow Conifer 1900
1910
1920
1930
1940
1950
1960
1970
INSTRUCTIONS
You will need to take data in order to analyze what is going on and to answer questions at the end of the lesson. Pay attention to what is happening to the population of beaver, aspen, willow, and conifers. As the years go by, mark with a plus (+) if the population increases, and a minus (-), if it decreases.
YEAR 1900
ELK POPULATION: LOW
YEAR 1910
ELK POPULATION: LOW
YEAR 1920
ELK POPULATION: LOW
YEAR 1930
ELK POPULATION: LOW
YEAR 1940
ELK POPULATION: LOW
YEAR 1950
ELK POPULATION: LOW
YEAR 1960
ELK POPULATION: LOW
YEAR 1970
ELK POPULATION: LOW
YEAR 1900
ELK POPULATION: HIGH
YEAR 1910
ELK POPULATION: HIGH
YEAR 1920
ELK POPULATION: HIGH
YEAR 1930
ELK POPULATION: HIGH
YEAR 1940
ELK POPULATION: HIGH
YEAR 1950
ELK POPULATION: HIGH
YEAR 1960
ELK POPULATION: HIGH
YEAR 1970
ELK POPULATION: HIGH