Warm UP – Explain

Cartoon.

Agenda • Practice Test

• Project

Agenda

• Warm UP: Study for Quiz

• Notes on Human Impact

• Determine your Carbon Footprint

• Work on Project/Study Guide

• Quiz

Human Activities Date: ______________

What do humans

have to do with it? • Humans affect ecosystems and geochemical cycles.

• People depend on Earth to provide clean water, breathable air, and soil capable of supporting crops.

• Human activities can affect the cycle and processes of Earth. They include:

– Population growth

– Technology

– Consumption of resources

Carrying Capacity

• The carrying capacity of an environment is the maximum population size that can be supported by the resources available.

– Energy, water, oxygen, and nutrients are just a few factors that determine the carrying capacity of Earth for the human population.

Sustainability • Sustainability is the ability of a species to survive

indefinitely.

• To achieve sustainability, there needs to be a balance between resources and carrying capacity, human needs, and needs of other species.

• Factors that affect human sustainability: – Population growth

– Technology

– Resource consumption

Population Growth • World-wide population has

grown exponentially and likely will continue to grow rapidly

• The natural slowing of population growth will result in increased death rate and decreased birth rate – it will be caused by – Food and water shortages

– Environmental pollution

– Diseases

Increasing populations will have

an effect on the amount of…

• Available clean water

– If clean water is used more than purified, it is not considered renewable in our lifetime.

• Waste produced

– More waste is produced than we can manage

– Some waste products are too complicated or expensive to remove once they are put into the environment

• Available fertile soil for agriculture

– Soil is often lost when land is cleared, making the land unusable for agriculture

Effect of Agriculture

• Worldwide demand for land has led to deforestation.

– As forests are cut down, fewer trees absorb CO2 and the increase in this gas leads to global warming – the heat on earth cannot escape the atmosphere

– Deforestation can increase erosion and decrease soil generation.

Technology • Technology is GREAT – it’s done so much for us in

the past few hundred years.

• It has also contributed to pollution of air, water, and land.

• We need to depend on technology to provide cleaner energy sources, safer ways to deal with waste, and better methods for cleaning up pollution.

Agricultural technology

GOOD: • Crop growing has improved to sustain our growing population. • Sustainable agricultural practices can help conserve fertile soil

and reduce erosion. BAD: • Farm machinery consumes nonrenewable resources and can

contribute to erosion and air pollution.

• The addition of chemicals (fertilizers, pesticides, fungicides, livestock waste) can alter soil composition and have a good or bad effect on water, carbon, or nitrogen cycles.

Industrial technology GOOD:

• Used for communication, transportation, and industry.

BAD:

• Certain chemicals deplete the ozone layer.

– Example: CFCs (chlorofluorohydrocarbons) – used in producing foam packing materials, for cleaning electrical components, and refrigeration chemicals (Freon).

• Disposing of outdated or damaged equipment is becoming an increasing concern.

Burning fossil fuels for industry and

transportation increases sustainability,

but it also…

– Increases the greenhouse gases released in the atmosphere (mainly carbon dioxide), which increases global temperatures (global warming) that affect sea levels, climate and atmospheric composition

Burning fossil fuels for industry and

transportation increases sustainability,

but it also…

– Produces acid rain, which leaches nutrients from soils, destroy plant life, and change the pH of aquatic ecosystems, affecting organisms that live there.

Alternative Energy

Technology • Using natural renewable energy sources (such as

wind, water, geothermal, or solar energy) decreases the burning of fossil fuels, which increases the quality of the atmosphere and the cycles involved.

• Using nuclear energy technology provides an alternative energy source that does not impact the atmosphere. However, the waste produced from nuclear energy use is becoming an increasing concern.

Consumption of

Resources • As the population increases, the demand for

resources also increases. However, there is a limited supply of these resources available.

• Sustainable use of resources can be accomplished by reducing consumption, reusing products rather than disposing of them, or recycling waste to protect the environment.

Renewable vs.

Nonrenewable Resources

• Renewable resources can be produced as they are consumed. – Food, clean water, timber

– Renewable resources have factors that limit their production, for example the amount of grain that can be produced is limited by the amount of land available for farming, fertility of the land, productivity of the grain, or availability of clean water.

• Nonrenewable resources cannot be produced at the same rate that they are consumed. – Fossil fuels

– The demand for minerals, metals, and ores increases because they are vital to industry but are decreasing in availability.

– Minerals are nonrenewable because mineral deposits are formed so slowly by geological processes that their formation is of no practical use to us.

Now What?

• Calculate your carbon footprint:

– http://www.myfootprint.org/

• calculating your carbon footprint

– Write a short paragraph on your impact on global warming AND list 5 things you can do to decrease your carbon footprint (Page 214)

• Work on your Study Guide (due Tomorrow)

• Finish your Project (due Wednesday)

• Quiz!

• Reminder: DUT on Wednesday; EOC on 23rd

Focus

Questions 1. Which three major types of human activities affect the cycles

and processes of Earth?

2. What is carrying capacity? What factors affect it?

3. What is sustainability?

4. Describe population growth. What causes it to slow down?

5. Increasing populations will have an effect on the amount of what?

6. What is the major effect of agriculture?

7. What are the major effects of technology?

8. What are the three types of technology? Describe them!

9. Describe the differences between renewable and nonrenewable resources.

Quiz – Human

Activities 1. What is carrying capacity?

2. What is sustainability?

3. Increasing populations will have an effect on the amount of what?

4. What is the major effect of agriculture?

5. What are the major effects of technology?

6. What are the three types of technology? Describe them!

7. Describe the differences between renewable and nonrenewable resources.

Test Review Day

• Get out your Study Guide to be checked!!!!

AGENDA

• Review Study Guide and Quizzes

• Work on Project

• YouTube Songs!

• Project Due and DUT TOMORROW!!!

Test Day

AGENDA

• Review for your DUT

• Turn in Notebooks

– Succession WS Page 196

– Cycle and Ecosystem WS Page 198

• Turn in your Project

Food Chain vs. Food Web

Autotroph/Heterotroph, Producer/Consumer

Energy Pyramid (#, producers)

Competition, Predation, PCM; Niche

Limiting Factors; abiotic vs. biotic; Indep vs. Dep

Succession- P vs. S; Pioneer Species

Nitrogen Cycle; Water Cycle; Carbon Cycle

Ozone Layer- cause; Temperature increase ; Soil Movement

Nonrenewable vs. Renewable

Carrying Capacity- controlled by; sustainability