AP Biology : Understanding Eco-Chemical Cycles

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #71 : Ecology

Which of the following best describes the process of deposition?

Possible Answers:

It is the opposite of sublimation

It is the conversion of water from a gaseous to a solid phase

It is neither the conversion of water from a gaseous to a solid phase nor is it is the opposite of sublimation

It is both the conversion of water from a gaseous to a solid phase and it is the opposite of sublimation

Correct answer:

It is both the conversion of water from a gaseous to a solid phase and it is the opposite of sublimation

Explanation:

Deposition is the conversion of water from a gaseous to a solid phase; therefore, deposition is the opposite process of sublimation.

Example Question #72 : Ecology

Which of the following best explains what occurs in the process of advection?

Possible Answers:

The movement of water through the atmosphere

The flow of water underground

Flow of water from the ground surface into the soil

The conversion of water from a solid phase to a gaseous phase

Correct answer:

The movement of water through the atmosphere

Explanation:

Advection can be described as the movement of water through the atmosphere and it is critical to the water cycle.

Example Question #73 : Ecology

Which of the following phase changes does water undergo during the process of condensation?

Possible Answers:

Liquid to gas

Solid to liquid

Liquid to solid

Gas to liquid

Correct answer:

Gas to liquid

Explanation:

Condensation is one of three stages of the water cycle. In the process of condensation, water converts from a gaseous phase to a liquid phase; thus, condensation is the opposite of the process of evaporation.

Example Question #74 : Ecology

Transpiration involves the release of water vapor from which of the following components of the terrestrial biosphere?

Possible Answers:

Plants and soil

Animals

Soil

Plants

Animals and soil

Correct answer:

Plants and soil

Explanation:

Transpiration is defined as the release of water vapor from plants and soil.

Example Question #75 : Ecology

Water flows through which of the following in the process of percolation?

Possible Answers:

Ground surface

Soil and rocks

Atmosphere

None of these

Correct answer:

Soil and rocks

Explanation:

Percolation is defined as the vertical flow of water through subsurface soil and rocks. Percolation is influenced by gravity.

Example Question #76 : Ecology

In which of the following processes does water flow through Earth’s mantle?

Possible Answers:

Percolation

Condensation

Sublimation

Plate tectonics

Correct answer:

Plate tectonics

Explanation:

The theory of plate tectonics describes the movement of the Earth’s crust and mantle. In plate tectonics, water moves through the Earth’s mantle and returns to the surface by volcanoes.

Example Question #77 : Ecology

Which of the following best describes the origin of the energy needed to drive the water cycle?

Possible Answers:

Burning of fossil fuels

Carbohydrates

Solar energy

Sugars

Correct answer:

Solar energy

Explanation:

The water cycle requires energy to drive the phase changes that defines different stages of the cycle. The sun in the form of solar energy provides the majority of the energy needed for this cycle.

Example Question #78 : Ecology

Which of the following is true regarding large ice sheets?

Possible Answers:

They are large reserves of water

Ice sheets are a part of the water cycle

All of these

Many, including Antarctica, have sequestered water for a long period of time

Correct answer:

All of these

Explanation:

Ice sheets are large areas of ice, including glaciers and ice caps. These represent large reserves of sequestered water that remain on the Earth’s surface for a very long time (i.e. those located in Antarctica). While ice sheets represent sequestered water, they are only a part of the water cycle due to the constantly changing climactic conditions of Earth.

Example Question #79 : Ecology

Which of the following best explains the relationship between water evaporation and temperature?

Possible Answers:

Evaporation decreases temperature due to the loss of energy

Evaporation decreases temperature due to addition of water vapor to the air

Evaporation increases temperature due to energy use

Evaporation increases temperature due to sensible heat

Correct answer:

Evaporation decreases temperature due to addition of water vapor to the air

Explanation:

The relationship between water evaporation and temperature is called “evaporative cooling.” Evaporative cooling is the principle that states that the release of water vapor into the air decreases the environment's temperature (i.e. sweating in mammals).

Example Question #80 : Ecology

Which of the following does not describe a human activity that impacts the water cycle?

Possible Answers:

Cultural mixing

Agriculture

Industry

Deforestation

Correct answer:

Cultural mixing

Explanation:

Human activity has a large impact on eco-chemical cycles, including the water cycle. Human activities that impact the cycle include agriculture, industry, and deforestation.

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