EOG Review

The graph shows the percentage of crops pollinated by honey bees in the United States. It has been estimated that more than 10 million beehives were lost in 2013 in the United States due to colony collapse disorder caused by the widespread use of pesticides. How will the decrease in the honey bee population affect the ecosystem?

• It will increase the percentages of almond and apple crops because insects other than honey bees will help pollinate these crops.

• It will increase the percentages of cotton and orange crops because these are less dependent on honey bee pollination.

• It will decrease the percentages of almond and apple crops because lesser numbers of honey bees are available for pollination.

• It will decrease the percentages of cotton and orange crops because the populations of other insects will also decline along with honey bees.

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NGSS.MS-LS2-1

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The diagram shows the temperature variations in two regions (X and Y) as ocean depth increases. Which statement correctly describes the behavior of dissolved gases in each of the two regions?

• Region Y would contain more dissolved gases than region X as the water is deeper and colder.

• Region X would contain more dissolved gases than region Y as the water is deeper and colder.

• Region Y would contain more dissolved gases than region X as the water is shallower and warmer.

• Region X would contain more dissolved gases than region Y as the water is shallower and warmer.

A student makes a model to demonstrate a functioning ecosystem by filling a glass jar with water and adding two goldfish and two butterfly fish. The student’s teacher says that the model could be improved. What should the student do to improve the model?

• The student should add more goldfish or butterfly fish to the jar.

• The student should keep the glass jar in sunlight.

• The student should change the water of the jar daily.

• The student should add small rocks and aquatic plants to the jar.

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Examine the map that shows the river basins of North Carolina and a star that indicates the location of a farm with runoff containing excess nitrates and phosphates. Which city(ies) need(s) to be concerned with potential algal blooms caused by the excess nitrate and phosphate pollution, and why?

• Fayetteville; the pollution will only affect the city that is closest to the source.

• Raleigh and New Bern; the pollution will travel both upstream and downstream within the river basin.

• New Bern; the pollution will only travel downstream within the river basin.

• Fayetteville and Wilmington; the pollution will travel directly south regardless of the river basin in which the source is found.

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Which actions are physical changes?

• P and Q

• Q and R

• R and S

• S and P

A group of researchers analyzed the water samples from four polluted lakes (P, Q, R, and S) for the presence of four different substances, as shown in the table.

Which lakes’ water samples exceed only one of the EPA’s maximum permissible levels?

• A. Lakes P and Q

• B. Lakes Q and S

• C. Lakes Q and R

• D. Lakes P and S

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Use the diagram that shows a river basin with three parts labeled X, Y, and Z to answer the question.

Which option correctly identifies the parts of the river basin labeled X and Y?

• X: river; Y: tributary

• X: tributary; Y: estuary

• X: tributary; Y: river

• X: river; Y: estuary

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What process is occurring at the location labeled Z?

• condensation

• evaporation

• infiltration

• transpiration

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The image shows an aquatic food chain. Which organism(s) will be unaffected if the krill are removed from the aquatic food web?

• fish

• penguin

• phytoplankton

• sqid

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In 1911, a small population of 25 reindeer was introduced on Saint Paul Island. The graph shows the increase in the population of reindeer on the island between 1911 and 1940 with four lines (W, X, Y, and Z) that represent the estimated reindeer population by 1950. If the reindeer population overgrazed their food supply in 1940, which line would likely represent the estimated population of reindeer on the island by 1950?

• W

• X

• Y

• Z

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NGSS.MS-LS2-1

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