Human Impact Review

What long-term impact could the destruction of large areas of forests have on Earth?

• decreased rates of erosion
• increased atmospheric carbon dioxide levels
• decreased amounts of acid rain
• increased atmospheric oxygen levels

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All of the following are examples of environmental changes that can be caused by humans except - 

• clearing land for housing developments
• pesticides
• volcanic eruption
• pollution

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Which human activity would preserve nonrenewable resources?

• deforestation
• removing carnivores from a forest 
• recycling
• heating homes with fossil fuels  

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Increased industrialization will most likely

• decrease available habitats 
• increase environmental carrying capacity 
• increase the stability of ecosystems 
• decrease global warming

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Deforestation of areas considered to have a lot of diversity could limit future agricultural and medical advances due to

• the maintenance of dynamic equilibrium

• the loss of biodiversity

• an increase in the ecosystem’s carrying capacity

• the depletion of the ozone layer

Deforestation by burning has been described as a "double whammy" to the environment, meaning it has 2 negative impacts. Why is this description accurate? 

• Forest burning releases CO₂ while decreasing oxygen, which disrupts cycles
• Deforestation reduces the amount of oxygen in the atmosphere, which depletes the ozone layer
• Forest clearing is often followed by land development, which often leads to increased noise pollution
• Deforestation increases the number of plant and animal species by destroying habitat

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Many common products, such as wooden furniture, paper, and books, are made from trees. Which of the following is a likely consequence of humans cutting down a forest in order to make use of the natural resources there? 

• the decrease of chemical runoff into the oceans
• increased acid rain
• the increase of light pollution in cities
• the destruction of habitats

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What are renewable resources?

• Resources that are used faster than they form

• Resources that can replenish themselves over time

• Resources that exist only in urban areas

• Resources that exist only in rural areas

Human activities that degrade ecosystems result in a loss of diversity of the living and nonliving environment.  Two ways in which humans frequently harm ecosystems and affect other organisms is through land use and pollution.

How does land use cause a reduction in biodiversity? 

• It decreases the space and resources available to certain species
• It causes herbivores to become carnivorous
• It provides a more hospitable living environment
• It causes all the natural Earth cycles to stop

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What are the two major causes for air pollution?

• factories and cars

• cigarettes and tobacco

• deforestation and recycling

• oil spills and hurricanes