7.5 L10 Monarch Butterflies on the Shortgrass Prairie

Identify the trends in the butterfly population. What does a section of the graph that shows a decreasing population over time look like?

• A section with an upward slope

• A section with a downward slope

• A section with a flat line

• A section with a zigzag pattern

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Identify the trends in the butterfly population. What color should be used to circle the sections of the graph that show an increasing population over time?

• Red

• Green

• Blue

• Yellow

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Annotate the butterfly population graph above (in Question 1) to show what is happening with the resource (milkweed) each year.

• The milkweed resource increases each year.

• The milkweed resource decreases each year.

• The milkweed resource remains constant each year.

• The milkweed resource fluctuates each year.

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The change in the number of milkweed plants is connected to how the population of monarch butterflies changed between 2009 and 2012.

• The population of monarch butterflies increased as the number of milkweed plants increased.

• The population of monarch butterflies decreased as the number of milkweed plants decreased.

• There was no change in the population of monarch butterflies despite the change in the number of milkweed plants.

• The population of monarch butterflies changed independently of the number of milkweed plants.

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Is this graph showing a normal fluctuation or an unusual trend in population size?

• Normal fluctuation

• Unusual trend

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What does the map show about the eastern monarch butterfly?

• The migration pattern of the eastern monarch butterfly.

• The population density of the eastern monarch butterfly.

• The habitat range of the eastern monarch butterfly.

• The diet of the eastern monarch butterfly.

In the 1990s, what change did farmers of corn and soybean make to their farming practices?

• They increased their farming of crops from fence to fence.

• They switched to organic farming.

• They reduced the use of fertilizers.

• They increased the use of manual labor.

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What is the impact of planting crops from fence to fence on milkweed growth?

• It increases milkweed growth.

• It decreases milkweed growth.

• It has no effect on milkweed growth.

• It promotes biodiversity.

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The change in the farming practices after 1990 affected the monarch butterfly population because:

• it led to the destruction of milkweed, the monarch's breeding habitat.

• it increased the use of pesticides that are harmful to monarchs.

• it caused climate changes that disrupted monarch migration patterns.

• it introduced new predators that prey on monarchs.

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Monarch butterflies are famous for their long-distance migration. To which area do they migrate for the winter?

• Northern Canada

• Amazon Rainforest

• Mexican forests

• European countrysides