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Warm-Up
1. How do you think life was different 1000 years ago compared to now?
2. What do you think was responsible for the change in the way we live our lives now?
Warm-up
In complete sentences, list three reasons why Mr. Sleep wants you to write today’s agenda in your notebook for THIS class.
Review Question Discussion pg. 8 1-4
Exit Pass Time
Chapter 1 Section 1:Introduction to Environmental SciencePart 29-1-2011
Learning Targets for 9-1-2011
Students will learn about the major environmental effects of hunter-gatherers, the agricultural revolution, and the Industrial Revolution.
Students will distinguish between renewable and non-renewable resources.
Students will know about the 3 different categories of environmental problems.
Our Environment Over Time
How have we changed our environment over time?
What city is this?
What do you think it was like before this city came to be?
Our Environment Over Time
Whenever humans have hunted, gathered, or grown food the environment changed.
In just over 200 years the area of Chicago has changed immensely.
How have we Changed Our Environment?
Three Causes of Change
Hunter-gatherers
Agricultural Revolution
Industrial Revolution
We will look at the effects on the environment and the characteristics of these changes.
Hunter-gatherers
People who obtain food by collecting plants and by hunting wild animals or scavenging their remains.
Groups were often small and they migrated depending on food sources and time of the year.
These groups still exist in the amazon.
Hunter-Gatherers
Affected their environments in many ways: Hunted bison, set fires to prevent growth of
trees on prairies, disappearance of giant bison, giant sloth, cave bears etc.
Climate change and over hunting lead to the extinction of several large mammals
Agricultural Revolution
Agriculture is the practice of growing, breeding and caring for plants and animals
Allowed human populations to grow at unprecedented rates
Groups concentrated and placed great pressure on the environment
The Agricultural Revolution
Changed the food we eat.Farmers started to collect seeds of
plants with desired traits.Farmland replaced forests,
grasslands and wetlands- many through slash and burn
The destruction of land for farming resulted in soil loss, floods and water storage.
The Industrial Revolution
In the mid 1700s a shift from energy sources like animals and water to fossil fuels occurred.
The increased use of fossil fuels like oil & coal changed society and improved agricultural efficiency, transportation and industry.
People left farming and cities became concentrated.
The Industrial Revolution
Introduced positive changes- inventions like the light bulb
Improved sanitation, nutrition, and medical care
Technologies came like the telephone, personal computers and artificial materials
Most of the problems studied in environmental science are associated with the Industrial Revolution and the increase in the human popultion
What are our environmental problems?
We can generally group our environmental problems into three categories.
Resource Depletion
Pollution
Loss of Biodiversity
Quick Question!
What is the difference between a renewable and nonrenewable resource?
Renewable resource- a resource that can be replaced by natural processes
Nonrenewable resource- a resource that forms at a much slower rate than it is consumed.
Resource Depletion Natural Resources- any
natural material used by humans
Renewable and Non-renewable
Both renewable and nonrenewable resources can be depleted
Pollution An effect of the industrial
revolution- waste being produced faster than disposal
Pollution- an undesired change in air, water or soil that can adversely affect health, survival or activities
There are two main types of pollution
Biodegradable and non-biodegradable
Loss of Biodiversity Biodiversity- the number and
variety of species that live in an area
Extinction- a natural process
Mass Extinctions- large scale extinctions
Organisms are natural resources
Species are nonrenewable resources
