Mega Ecology & Biogeochemical Review

Stream nitrate concentrations after a watershed was clear-cut, showed that stream nitrate concentration ____________?

• fluctuated

• remained the same

• decreased

• increased

• not enough data to answer

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which macronutrient is required by humans in the largest amounts?

• Calcium

• Nitrogen

• Sulfur

• Potassium

• Magnesium

An algal bloom is ________?

• a pretty flower

• slow accumulation of algae in a waterway

• slow decrease of algae in a waterway

• rapid decrease of algae in a waterway

• rapid increase of algae in a waterway

Which substance is associated with algal blooms?

• Dissolved carbon dioxide

• Sulfur

• Dissolved oxygen

• Potassium

• Phosphorus

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What impact does deforestation have on the carbon cycle?

• Increase in amount of CO2 in the atmosphere

• Decrease in the amount of CO2 in the atmosphere

• Increase in the amount of photosynthesis

• Increase in the amount of cellular respiration performed by autotrophs

• Deforestation has no impact on the carbon cycle

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

What is the major source of phosphorus on land?

• Deposition from atmospheric phosphorus

• Compounds that are formed by autotrophs during photosynthesis

• Compounds released from the weathering of rocks

• Compounds formed from bacterial conversion

• Compounds dissolved in precipitation

What happens during nitrogen fixation?

• Bacteria in the soil convert nitrate into nitrogen gas and nitrous oxide

• Nitrogen wastes are converted by bacteria into ammonium

• Organisms convert nitrogen into carbon dioxide and energy

• Atmospheric nitrogen diffuses into the soil and is converted into ammonia by bacteria

• Nitrogen is absorbed by plants

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What form of Nitrogen is assimilated into plants?

• Nitrite, NO₂^-

• Ammonia, NH₃

• Ammonium, NH₄⁺

• Nitrate, NO₃^-

• Choices B, C, and D

Which stage of the hydrologic cycle can be the most direct cause of algal blooms?

• Evaporation

• Precipitation

• Transpiration

• Infiltration

• Runoff

Tags

NGSS.MS-ESS2-4

What effect will an algal bloom have on the oxygen content of the water?

• The algae bloom will cause the oxygen content in the water to increase overall

• The algae bloom will cause the oxygen content in the water to decrease, leading to hypoxic conditions

• The algae bloom will have no impact on the oxygen content of the water

• The algae bloom will cause rapid fluctuations oxygen in the water

• The oxygen content will vary based on the depth of the water

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4