$$\text{H}_2\text{O (liquid)} \rightarrow \text{H}_2\text{O (gas)}$$

Question 1

Which of the following best describes the biosphere?

Accepted Answer

All of Earth that is inhabited by life, including the atmosphere, land, and oceans.

Question 2

Which of the following is an example of a biotic factor in an ecosystem?

Accepted Answer

Bacteria in the soil

Question 3

A population is defined as:

Accepted Answer

A group of individuals of the same species living in a particular geographic area.

Question 4

Rachel Carson’s book 'Silent Spring' was influential because it:

Accepted Answer

Highlighted the dangers of widespread pesticide use and its impact on the environment.

Question 5

Which abiotic factor is most directly responsible for the distribution of terrestrial biomes?

Accepted Answer

Temperature and precipitation

Question 6

Why are non-bird reptiles and amphibians generally absent from Himalayan alpine meadows?

Accepted Answer

They cannot tolerate the low temperatures found at high altitudes.

Question 7

Which of the following best explains why estuary pollution can affect animals that do not live permanently in estuaries?

Accepted Answer

Many species use estuaries as breeding or feeding grounds during part of their life cycle.

Question 8

Which equation best represents the process of transpiration in the water cycle?

Accepted Answer

$$	ext{H}_2	ext{O (liquid)} ightarrow 	ext{H}_2	ext{O (gas)}$$

Question 9

Which of the following is a key adaptation that allows pronghorns to survive in open plains and shrub deserts?

Accepted Answer

Exceptional running speed to escape predators

Question 10

What is the main reason why soils in tropical rain forests are poor in nutrients?

Accepted Answer

Nutrients are rapidly recycled and taken up by plants, leaving little in the soil.

Question 11

Which process is primarily responsible for the existence of seasons on Earth?

Accepted Answer

The tilt of Earth's axis as it orbits the sun

Question 12

Which of the following best describes the photic zone in marine environments?

Accepted Answer

The region where photosynthesis by phytoplankton and algae can occur

Question 13

Why do fires help maintain savannas as grassland ecosystems?

Accepted Answer

Fires prevent the establishment of woody plants, allowing grasses to dominate.

Question 14

Which of the following is a major environmental problem associated with deserts?

Accepted Answer

Desertification, the conversion of semi-arid regions to desert

Question 15

How do the soils of temperate broadleaf forests differ from those of tropical rain forests?

Accepted Answer

Temperate broadleaf forest soils are generally richer in nutrients due to slower decomposition rates.

Question 16

Which three abiotic factors account for the rarity of trees in arctic tundra?

Accepted Answer

Low temperatures, permafrost, and high winds

Question 17

Which of the following best explains why similar biomes can be found in geographically distant places?

Accepted Answer

Similar climate conditions lead to similar types of vegetation and animal life.

Question 18

What is the main way that living organisms contribute to the water cycle?

Accepted Answer

By releasing water vapor into the atmosphere through transpiration

Question 19

Which of the following is a plausible consequence of widespread use of DDT in an ecosystem?

Accepted Answer

Bioaccumulation of DDT leading to eggshell thinning and population declines in birds of prey

Question 20

Why does sewage cause algal blooms in lakes?

Accepted Answer

Sewage adds inorganic nutrients, such as nitrogen and phosphorus, that promote rapid algal growth.

The Biosphere: An Introduction to Earth's Diverse Environments

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