Chapter 4 - Interacting with the Biosphere

The earth’s ability to maintain its balance indefinitely by cycling water and other resources is known as

• sustainability.

• recycling theory.

• ecological stasis.

• biogeochemical cycles.

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Which of the following statements is compatible with a biblical worldview?

• God wants us to use the earth’s resources without worrying about the future.

• Chaos and randomness in Earth’s systems have produced life on the planet.

• Checks and balances in earth processes maintain a designed order for the earth.

• We shouldn’t work to save endangered species because of the survival of the fittest.

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During the water cycle, water from underground reservoirs can seep into __________.

• springs

• lakes

• oceans

• all of these

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Water exits the leaves of plants during the process of __________.

• boiling

• precipitation

• transpiration

• condensation

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Most free oxygen (O₂) in the earth’s atmosphere is produced by

• volcanic eruptions.

• photosynthesis in plants and algae.

• burning fossil fuels.

• decomposing organic matter.

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Most of the earth’s carbon is trapped in __________.

• the ocean

• underground

• both

• neither

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Nitrogen can be fixed by

• bacteria in the roots of legumes.

• bacteria in the soil.

• lightning strikes.

• all of these.

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Humans get their nitrogen from

• nitrogen in the atmosphere.

• the food they eat.

• bacteria in their intestines.

• none of these.

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Population density is the

• number of individuals per unit of area.

• ratio of one species to the total number of species.

• total number of species in an area.

• total number of populations in an area.

Trout growth is determined by food availability. A young wild trout might grow only three or four inches in length during its first year of life, while a well-fed hatchery trout can reach nine inches in the same amount of time. In this example, food availability is a(n) __________ for trout growth.

• inhibitor

• limiting factor

• carrying capacity

• exponential resource

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