Ecology Review SB5d,e: Human Impacts

Front

Global warming has been linked to a decrease in: the size of the polar ice caps, the temperature of Earth, the rate of species extinction, the rate of carbon dioxide production.

Back

the size of the polar ice caps

Front

Which human activity would preserve nonrenewable resources? Options: deforestation, removing carnivores from a forest, recycling, heating homes with fossil fuels

Back

recycling

Front

Which human activity is correctly paired with its likely future consequence? Options: overfishing in the Atlantic — increase in supply of flounder and salmon as food for people, development of electric cars or hybrid vehicles — increased rate of global warming, use of fossil fuels — depletion of fossil-fuel based resources and increased CO₂ in atmosphere, genetically engineering animals — less food available to feed the world’s population

Back

use of fossil fuels — depletion of fossil-fuel based resources and increased CO₂ in atmosphere

Front

Which human activity would most likely deplete nonrenewable resources?

Back

Increased use of fossil fuels

Front

Why is water considered a precious resource despite covering 75% of Earth's surface?

Back

Only a small fraction of the Earth's water is freshwater available for drinking and irrigation.

Front

How does eutrophication affect other organisms in water when fertilizers increase nitrogen content?

Back

Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.

Front

What is deforestation?

Back

cutting and removal of large tracts of forest to make land available for other uses

Front

What are some consequences of deforestation? Options: increased population in cities, building of more infrastructure, soil erosion, loss of biodiversity, loss of ability to remove CO₂ from the atmosphere, more mercury and cyanide released into rivers

Back

soil erosion, loss of biodiversity, loss of ability to remove CO₂ from the atmosphere

Front

What would most likely affect the acidity of a local stream? Options: a change in the percentage of decomposers living in the stream, a new source of air pollution, a new predator species being introduced to the ecosystem, a decrease in the amount of sunlight that reaches the stream.

Back

a new source of air pollution

Front

In lakes in New York State that are exposed to acid rain, fish populations are declining. This is primarily due to changes in which lake condition?

Back

pH