Resources and Living Things
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Transcript of Resources and Living Things
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Resources and Living Things
Chapter 3 Test Review
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Air pollution in Los Angeles is what type of source?
nonpoint source
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Occurs naturally in the environment and is used by people.
natural resource
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Contamination of Earth’s land, water, or air.
pollution
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Decisions about how to protect Earth’s atmosphere are made on what level?
global
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Who provides the data that is considered when resolving an environmental issue?
environmental scientists
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What causes a demand for resources to grow?
population growth
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Three general categories of environmental issues.
pollutionresource use
population growth
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What type of proposals have costs and benefits that are often economic?
environmental
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Can be grouped in two categories, point source and nonpoint source.
pollution
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Fresh water is an example of what type of resource?
natural resource
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Humans depend on natural resources for what two reasons?
survival and development
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Allows resources to last longer.
conservation
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What makes a larger ecological footprint?
high level of resource use
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Using a resource in ways that maintain the resource at a certain quality for a certain period of time.
sustainable use
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Resources that are replaced as fast as they are used.
renewable resource
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Natural resources that were formed over millions of years.
oil and coal
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Determines a population’s life or death.
health and disease
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Today’s human population of Earth.
more than 7.1 billion
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Experts agree or disagree over whether the human population will stop growing?
disagree
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Do people live longer in most areas of the world today than ever in human history?
yes
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Occurs when a population grows at an ever-increasing rate.
exponential growth
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Advances in what have improved human health and allowed for tremendous population growth?
medicine and technology
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As the human population grows, the demand for what increases?
natural resources
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If population and the demand for natural resources continue to grow, will the human population be too large for Earth to support?
yes
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An area with a large population of valuable ocean organisms.
fishery
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Raising water-dwelling organisms for food in an artificial pond.
aquaculture
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Why can forests be renewable resources?
New trees can be planted to replace trees that are cut down
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Cutting down only some trees in a forest.
selective cutting
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Approach to managing fisheries that can involve banning or restricting fishing of certain species.
setting fishing limits
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Fishing methods like poisoning fish with cyanide are outlawed for what reason?
to manage resources for a sustainable yield
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One disadvantage of clear-cutting.
erosion
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How trees help other organisms.
they produce oxygen and absorb carbon dioxide
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What percentage of the US land area is made up of forests?
1/3
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Major cause of distinction.
habitat destruction
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Species that could become endangered in the near future.
threatened species
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Prohibits trade or products made from threatened or endangered species.
Endangered Species Act
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The most effective way to preserve biodiversity.
protecting whole ecosystems
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Has both an economic and ecological value within an ecosystem.
biodiversity
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Influences the survival of many other species in an ecosystem. (ex. sea otter)
keystone species
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Affect biodiversity in an ecosystem?
climate, area, and diversity
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The most diverse ecosystems in the world.
rain forests
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How can people directly cause the extinction of some species?
habitat destruction hunting