Resources and Living Things

Chapter 3 Test Review

Air pollution in Los Angeles is what type of source?

nonpoint source

Occurs naturally in the environment and is used by people.

natural resource

Contamination of Earth’s land, water, or air.

pollution

Decisions about how to protect Earth’s atmosphere are made on what level?

global

Who provides the data that is considered when resolving an environmental issue?

environmental scientists

What causes a demand for resources to grow?

population growth

Three general categories of environmental issues.

pollutionresource use

population growth

What type of proposals have costs and benefits that are often economic?

environmental

Can be grouped in two categories, point source and nonpoint source.

pollution

Fresh water is an example of what type of resource?

natural resource

Humans depend on natural resources for what two reasons?

survival and development

Allows resources to last longer.

conservation

What makes a larger ecological footprint?

high level of resource use

Using a resource in ways that maintain the resource at a certain quality for a certain period of time.

sustainable use

Resources that are replaced as fast as they are used.

renewable resource

Natural resources that were formed over millions of years.

oil and coal

Determines a population’s life or death.

health and disease

Today’s human population of Earth.

more than 7.1 billion

Experts agree or disagree over whether the human population will stop growing?

disagree

Do people live longer in most areas of the world today than ever in human history?

yes

Occurs when a population grows at an ever-increasing rate.

exponential growth

Advances in what have improved human health and allowed for tremendous population growth?

medicine and technology

As the human population grows, the demand for what increases?

natural resources

If population and the demand for natural resources continue to grow, will the human population be too large for Earth to support?

yes

An area with a large population of valuable ocean organisms.

fishery

Raising water-dwelling organisms for food in an artificial pond.

aquaculture

Why can forests be renewable resources?

New trees can be planted to replace trees that are cut down

Cutting down only some trees in a forest.

selective cutting

Approach to managing fisheries that can involve banning or restricting fishing of certain species.

setting fishing limits

Fishing methods like poisoning fish with cyanide are outlawed for what reason?

to manage resources for a sustainable yield

One disadvantage of clear-cutting.

erosion

How trees help other organisms.

they produce oxygen and absorb carbon dioxide

What percentage of the US land area is made up of forests?

1/3

Major cause of distinction.

habitat destruction

Species that could become endangered in the near future.

threatened species

Prohibits trade or products made from threatened or endangered species.

Endangered Species Act

The most effective way to preserve biodiversity.

protecting whole ecosystems

Has both an economic and ecological value within an ecosystem.

biodiversity

Influences the survival of many other species in an ecosystem. (ex. sea otter)

keystone species

Affect biodiversity in an ecosystem?

climate, area, and diversity

The most diverse ecosystems in the world.

rain forests

How can people directly cause the extinction of some species?

habitat destruction hunting