Interdependence &

Populations

SC.912.L.17.5 Analyze how population size is determined by

births, deaths, immigration, emigration, and limiting factors

(biotic and abiotic) that determine carrying capacity.

1. Students will use data and information about population

dynamics, abiotic factors, and/or biotic factors to explain and/or

analyze a change in carrying capacity and its effect on population

size in an ecosystem.

What might

cause the

population to

go up and

down in this

environment?

1. Students will use data and information about population

dynamics, abiotic factors, and/or biotic factors to explain and/or

analyze a change in carrying capacity and its effect on population

size in an ecosystem.

Birth rates outnumber death rates, population will increase

Death rates outnumber birth rates, population will decrease

The growth rate of a population is measured in terms of birth

rate and death rate.

Fertility rates, life expectancy, migration/immigration also

contribute to changes in population.

Human Impact

SC.912.L.17.20 Predict the impact of individuals on

environmental systems, and examine how human lifestyles

affect sustainability.

1. Students will predict how the actions of humans may

impact environmental systems and/or affect sustainability.

Impact of Humans on the Environment:

Cause extinction through hunting, fishing, agriculture, industry,

and urban environment

Growing human population = higher demands on

environment

Affect quality and quantity of land, air, and water resources

1. Students will predict how the actions of humans may

impact environmental systems and/or affect sustainability.

Humans also cause pollution:

Air pollution = smog, acid rain, dust, smoke, gases, fog,

carbon dioxide

Land pollution = landfills, dumpsites, runoff, negligence, urban

wastes

Water pollution = sewers, industries, farms, homes, chemical

waste, fertilizer, dirty dish water

1. Students will predict how the actions of humans may

impact environmental systems and/or affect sustainability.

All of these human impacts cause a DECREASE in BIODIVERSITY!

Biodiversity is the variety of life in an area that is determined

by the number of different species in that area.

1. Students will predict how the actions of humans may

impact environmental systems and/or affect sustainability.

Humans can help to conserve biodiversity by:

Conserving energy resources

Protecting and conserving material resources

Controlling pollution (recapture wastes, carpooling, solid waste

neutralization)

Wildlife conservation to protect animals from habitat loss,

overhunting, and pollution

Reduce, reuse, recycle programs

Sanitation and waste disposal programs

2. Students will evaluate possible environmental impacts

resulting from the use of renewable and/or nonrenewable

resources.

Renewable Resources: resources that are replaced by natural

processes faster than they are consumed

Examples: solar energy, wind energy, water energy

These sources can often be costly, and new technologies are

still being utilized. These resources are not unlimited and may

eventually become depleted if they become consumed faster

than can be made.

2. Students will evaluate possible environmental impacts

resulting from the use of renewable and/or nonrenewable

resources.

Nonrenewable Resources: resources that are found on Earth in

limited amounts or that are replaced by natural processes

over extremely long periods of time

Examples: oil, coal, natural gas

These sources can are often more cost effective, but are found

in limited quantities.