A. Monarch Butterflies on the Shortgrass Prairie- Assessment GRADED

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The monarch butterfly population changes every year, and scientists are concerned about what might happen to the population over time. The graph below is the data collected between 2009 and 2012 for the populations of monarch butterflies. The area of occupied forests is a method scientists use to estimate the number of butterflies.
In the graph below, the greater the area of occupied forest, the more butterflies.
Follow the directions below for your butterfly population graph (paper)!

Identify the trends in the butterfly population.

Circle the sections of the graph that show a decreasing population over time in RED.

Identify the trends in the butterfly population.

Circle the sections of the graph that show an increasing population over time in BLUE.

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Milkweed is important to the survival of the butterflies. In years with lower-than-normal rainfall, there can be fewer milkweed plants. The table shows the number of milkweed plants per hectare from 2009 to 2012.
Annotate the butterfly population graph to show what is happening with the resource (milkweed) each year.

Annotate the graph for the amount of milkweed of each year

Annotate the graph for the amount of rainfall of each year

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How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 3 you created a claim. What evidence best below supports your claim?

In 2012 the milkweed plants population was low and the butterfly population was low.

In 2012 the milkweed plants population was low and the butterfly population was high.

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How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 4 you chose the best piece of evidence.
How does the evidence prove your claim is true?

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The graph shows the eastern monarch butterfly population from 1993 to 2018. The gray line is a trend line that shows the overall pattern of change in the amount of land occupied by butterflies over time. Remember, the area of occupied forests is a method scientists use to estimate the number of butterflies.
In the graph below, the greater the area of occupied forest, the more butterflies.
Is this graph showing a normal fluctuation or an unusual trend in population size?

normal fluctuation

unusual trend

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This map shows the eastern monarch butterfly migration route. The black-shaded area shows where the prairies in the Midwestern United States used to be but are now mostly soybean and corn farms.
In the 1990s, farmers of corn and soybean changed their farming practices.
Before 1990, there was space between plants for milkweed to grow.
Now, farmers can grow corn and soybean from fence to fence leaving no space for milkweed.
Scientists estimate that there is only 1-2% of milkweed left in this area now compared to what was there before it was farmed.
How did the change in farming after 1990 affect the monarch butterfly population?

They changed farming to make more money.

They butterflies migrated to Boston.

Farming decreased the milkweed that butterflies need to survive.

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How did the change in farming after 1990 affect the monarch butterfly population?
In number 7 you chose a claim to the question above. What evidence best below supports your claim?

Farming practice changed in 1990 and the population has decreased since then.

Farming practice changed in 1990 and the population has increaased since then.

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How did the change in farming after 1990 affect the monarch butterfly population?
In number 8 you chose the best piece of evidence.
How does the evidence prove your claim is true?

A. Monarch Butterflies on the Shortgrass Prairie- Assessment GRADED

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?In number 3 you created a claim. What evidence best below supports your claim?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?In number 4 you chose the best piece of evidence. How does the evidence prove your claim is true?

How did the change in farming after 1990 affect the monarch butterfly population?In number 7 you chose a claim to the question above. What evidence best below supports your claim?

How did the change in farming after 1990 affect the monarch butterfly population?In number 8 you chose the best piece of evidence.How does the evidence prove your claim is true?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?In number 3 you created a claim. What evidence best below supports your claim?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?In number 4 you chose the best piece of evidence. How does the evidence prove your claim is true?

How did the change in farming after 1990 affect the monarch butterfly population?In number 7 you chose a claim to the question above. What evidence best below supports your claim?

How did the change in farming after 1990 affect the monarch butterfly population?In number 8 you chose the best piece of evidence.How does the evidence prove your claim is true?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 3 you created a claim. What evidence best below supports your claim?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 4 you chose the best piece of evidence.
How does the evidence prove your claim is true?

How did the change in farming after 1990 affect the monarch butterfly population?
In number 7 you chose a claim to the question above. What evidence best below supports your claim?

How did the change in farming after 1990 affect the monarch butterfly population?
In number 8 you chose the best piece of evidence.
How does the evidence prove your claim is true?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 3 you created a claim. What evidence best below supports your claim?

How does the change in the number of milkweed plants affect the population of monarch butterflies between 2009 and 2012?
In number 4 you chose the best piece of evidence.
How does the evidence prove your claim is true?

How did the change in farming after 1990 affect the monarch butterfly population?
In number 7 you chose a claim to the question above. What evidence best below supports your claim?

How did the change in farming after 1990 affect the monarch butterfly population?
In number 8 you chose the best piece of evidence.
How does the evidence prove your claim is true?