Aquatic Science Fall 2025 Semester Exam Review

The only nutrient cycle in which the atmosphere is NOT part of the cycle is_____________________.

• Nitrogen Cycle

• Phosphorus Cycle

• Carbon Cycle

• None. They all involve the atmosphere at some point in their cycle.

When conducting an experiment, you are testing the

• Control Group

• Independent Variable

• Hypothesis

• Dependent Variable

A water test on a freshwater aquarium reveals the presence of high levels of Nitrates. What is the most likely source?

• Large amounts of decomposing organic matter being broken down into ammonia and converted into Nitrates

• Nitrates dissolving into the water from the air

• Reaction of Nitrogen with water

• Nitrates originating from Photosynthesis

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Why should the presence of Coliform bacteria in a water source be of concern?

• The presence of Coliform bacteria is an indication of high level of nitrates and phosphates in the water

• Coliform bacteria are an indication of low dissolved oxygen in the water

• The presence of Coliform bacteria is an indication of low pH

• The presence of Coliform bacteria is an indication of human or animal waste in the water, and can make people ill if ingested

The three factors that determine the formation of surface currents are____________________________.

• Global Winds, Temperature, Coriolis Effect

• Temperature, Salinity, Global Winds

• Global Winds, Coriolis Effect, Continental Deflections

• Temperature, Salinity, Coriolis Effect

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(1) Runoff from farmlands where fertilizers are used can contribute to organic pollution. (2) This would be considered point-source pollution.

• 1 and 2 are both true

• 1 is false, and 2 is true

• 1 is true, and 2 is false

• 1 and 2 are both false

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Identify the bottom feature labled "B."

• Abyssal plain

• Guyot

• Seamount

• Continental rise.

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The depth to which light penetrates is known as the ______________________

• Neutral Zone

• Limnetic Zone

• Photic Zone

• Littoral Zone

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The study of the physical, chemical, and biological properties of freshwater ecosystems is known as ______________________________.

• Limnology

• Hydrology

• Bathymetry

• Oceanography

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Due to the Earth's rotation, fluids (such as air and water) tend to circulate in a clockwise pattern when North of the Equator, but takes a counter-clockwise pattern when flowing South of the Equator. What is the name of this phenomena?

• Magnus Effect

• Coanda Effect

• Mandela Effect

• Coriolis Effect

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