Science 8 Dead Fish in the Delta Pre-test \

Compare the impervious surface area in 1984 to 2010. Choose the two (2) sentences that would explain changes in conditions of the Chesapeake Bay Watershed.

• The population of the Chesapeake Bay Watershed increased from 1984 to 2010.

• The amount of nutrients to the Chesapeake Bay Watershed decreased from 1984 to 2010.

• The amount of nutrients to the Chesapeake Bay Watershed increased from 1984 to 2010.

• The population of the Chesapeake Bay Watershed decreased from 1984 to 2010.

• The amount of nutrients to the Chesapeake Bay Watershed would not change from 1984 to 2010.

Agricultural practices can negatively impact nearby sources of water by

• clearing trees to plant crops.

• spraying chemical pesticides on crops.

• using gasoline to power farm equipment.

• using farm equipment made from refined metals.

Explain the relationship between extinction and biodiversity.

• Extinction contributes to an increase in biodiversity.

• Extinction contributes to a decrease in biodiversity.

• Extinction randomly changes biodiversity in one direction or the other.

• Extinction has no impact on biodiversity.

Developers want to cut down a forest to make room for a new development. What is the biggest problem with cutting down the forest?

• It increases the population of the area and, therefore, the demand for natural resources.

• It depletes a large supply of timber, a natural resource.

• It destroys an ecosystem, and results in multiple natural resources disappearing.

• It does not pose any problems.

Which of the following two statements is correct regarding the image above? Choose two statements.

• Water quality in the bay is improved by excess fertilizers used on the farm.

• Water quality in the bay is impaired by excess fertilizers used on the farm.

• Water quality in the bay is improved by storm water runoff from the city.

• Water quality in the bay is impaired by storm water runoff from the city.

Select the correct sequence of steps which cause algal blooms and subsequent fish kills.

• oxygen depletion, excess nutrients in waterways, aquatic species die, rapid growth of algae

• rapid growth of algae, excess nutrients in waterways, aquatic species die, oxygen depletion

• excess nutrients in waterways, aquatic species die, rapid growth of algae, oxygen depletion

• excess nutrients in waterways, rapid growth of algae, oxygen depletion, aquatic species die

Residents of a town are concerned about water pollution in a nearby river. Which of these actions would likely have the most positive impact on the health of the river?

• planting more trees along streets in the town

• installing solar panels on buildings in the town

• increasing public transportation options in the town

• spraying fewer chemicals on crops grown in the town

A student creates the model below to test the infiltration rate of water through four different materials that are commonly used in a suburban yard. The model contains the same thickness of each material, with a pan below the model to capture water that has infiltrated. Of the materials in this model, which is likely to have the greatest amount of surface water runoff and least amount of infiltration?

• Material A

• Material B

• Material C

• Material D

Julio states, "The Nile is the longest river in the world, so all people who live in northeastern Africa near the Nile have unlimited access to fresh water." Which statement is true?

• Julio is correct.

• Julio is incorrect because he fails to consider how much water is in the river.

• Julio is incorrect because he fails to consider any barriers that might hamper access to the river.

• Julio is incorrect because he fails to consider the exact location of the Nile.

What effect does population growth have on the supply of resources?

• Population growth increases the demand and decreases the supply of natural resources.

• Population growth decreases the demand and increases the supply of natural resources.

• Population growth decreases the demand and decreases the supply of natural resources.

• Population growth has no effect on the supply of natural resources.