Chapter 6.1 (pages 156-161)

Biodiversity and Problems

in the environment

Key concepts:

• List five kinds of pollutants.• Distinguish between renewable and nonrenewable

resources.• Describe the impact of exotic species.• Explain why human population growth has

increased.• Describe how habitat destruction affects biodiversity.

• Give two examples of how pollution affects humans.

Key Vocabulary:

• Pollution• Renewable

resource• Nonrenewable

resource• Overpopulation• Biodiversity

Imagine if your world was this:

How would you have to

change?

Pollution:

• Pollution an unwanted changein the environment caused by substances

• How do scientists classify pollution:– Garbage– Chemicals– High-powered waste– Gases: a HUGE problem– Noise

Which of these do you think is the biggest problem?

Know examples of

each of these:High-powered: nuclear waste

Renewable vs. Non-renewable:• Renewable resource: one that can

be replaced at the same rate that it is used– Solar and wind– Kudzo and bamboo

• Non-renewable resource: one that cannot be replaced or that can be replaced only over thousands/millions of years– Fossil fuels and mineral– Fresh Water???

Food for thought:

Object Decomposition TimeStyrofoam container> 1 million yearsPlastic jug 1 million yearsAluminum can 200-500 yearsDisposable diaper 550 yearsTinned can 90 yearsLeather shoe 45 yearsWool sock 1 yearPaper bag 1 monthBanana peel3-4 weeks

http://extra.mdc.mo.gov/nomoretrash/facts/

Exotic/Invasive Species:

• The carrying of exotic species to places that they don’t live causes problems!– Organism that makes a home for

itself in a new place outside its native home

– Examples:• Boa python in Florida• Northern snakehead• Kudzu

What do you think is the problem with this?

Human Population Explosion!

• What has helped human population growth explode???

• Immunizations• Medicine• Toilets• Hygiene• Refrigerators

J-curve

http://www.globalchange.umich.edu/globalchange2/current/lectures/human_pop/human_pop.html

BUT is it a good thing? What about food

supply? Land?

Habitat destruction:

• Biodiversity: the number and variety of organisms in a given area during a specific period of time – We need materials from the

environment for human needs– Deforestation– Loss of rain forest– Mining– Point-Source Pollution– Nonpoint-source pollution• Dumping

Pictures:-What d oyou think?

What can you do?

Humans

Pollution effect on humans?

• How are we effected by the types of pollution known today?– Chernobyl?– Japan?– Chemicals in the water?

Pictures:

The horrors of man are our responsibility…

Post-it Time:

• What can you do?

Review:• Pollutants include garbage, chemicals, high-energy wastes, gases,

and noise.• Renewable resources can be used over and over. Nonrenewable

resources cannot be replaced or are replaced over thousands or millions of years.

• Exotic species can become pests and compete with native species.• Overpopulation happens when a population is so large that it

can’t get what it needs to survive.• Habitat destruction can lead to soil erosion, water pollution, and

decreased biodiversity.• In addition to harming the environment, pollution can harm

humans.

Homework:

• Questions on page 161: Write the ?– Do this on the back of your notes:– # 3-12