Final Exam // Environmental Science // 2025

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What is the defining difference between the marine, freshwater, and estuary biomes? (J#3)

• Salinity (dissolved salt)
• Sunlight
• Oxygen
• Amount of Water

Dirt, sand, and silt are classified as what type of pollution? (J#5, 7)

• toxins
• sediment
• nutrient
• bacterial

Increasing ocean temperatures are causing greater ________ and reducing the amount of ________ in the ocean. (J#3)

• upwelling; nutrients
• thermoclines; upwelling
• wind action; nutrients
• upwelling; thermoclines

A large farm near your house is contaminating the local stream with fertilizer runoff. This pollution could be categorized as (J#5)

• point-source chemical pollution
• nonpoint-source nutrient pollution
• point-source sediment pollution
• nonpoint-source thermal pollution

Which type of pollution could cause the water in a stream to become dirty/muddy looking? (J#5, 7)

• chemical
• biological
• thermal
• sediment

Rank endangered, threatened, & extinct from MOST to LEAST living numbers of individuals.

• endangered, threatened, extinct
• threatened, endangered, extinct
• extinct, threatened, endangered
• endangered, extinct, threatened

If the gene pool of two populations are separated, the populations may develop into a new species. This is called

• natural selection
• speciation
• genetic separation
• interspecific competition

Which of the following statements describes how the development of roads, homes, buildings, canals, and fences most directly threatens wildlife?

• The pollution from the building processes damages wildlife habitats.
• The poaching endangers species.
• The human development destroys wildlife habitats.
• Exotic species imported for development can take over wildlife habitats.

Over-exploitation of a species by humans is likely to cause:

• speciation
• species extinction
• interspecific competition
• behavioral isolation