living resources environmental issues forests and fisheries biodiversity the search for new...
TRANSCRIPT
Living Resources
Environmental Issues
Forests and Fisheries
Biodiversity
The Search for New Medicines
Table of Contents
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What is an issue?What are some examples of issues that you have heard about? With your partner write down 3 issues that you are aware of today in Thailand.
An example of an issue is below.
Should we build a Bangkok Disney in a wet land?
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Types of Environmental Issues-Resource use
-Population growth
-Pollution
-Making responsible decisions
- Balancing different needs- Types of costs and benefits- Weighing costs and benefits
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Classroom Issues• Global Warming• Rural Flooding• Unemployment• Loud teachers• No kissing in school• Drivers License age• Gay marriage• Skating in public• Drinking age
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Main Idea
Detail Detail Detail
Identifying Main IdeasAs you read the section “Types of Environmental Issues,” write the main idea in a graphic organizer like the one below. Then write three supporting details that give examples of the main idea.
Three types of environmental issues are…
Resource use Population growth Pollution
- Environmental Issues
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For HomeworkComplete the Section assessment #1
Complete the Guided Reading Worksheet Section #1
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End of Section:Environmental
Issues
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Identifying Forest Products• What things can you find in the classroom that came from
the forest?
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What happened to the Tuna?• Lab Zone P. 89• Complete the graph.• Inferring: Describe the changes in the tuna population during
this period. Can you suggest a reason for these changes?
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What products come from the forest?• Nuts• Lumber• Pulp• Rubber• Fruit
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Managing ForestsClear-cutting involves cutting down all the trees in an area at once. Selective cutting involves cutting down only some trees.
- Forests and Fisheries
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Logging Methods Activity
Click the Active Art button to open a browser window and access Active Art about logging methods.
- Forests and Fisheries
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How do we manage fishing in Thailand?• Lab Zone p. 92 Calculating
• How do we prevent over fishing?
– Fishing limits– Fishing methods– Aquaculture– New resources
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What You Know
What You Learned
Before you read, write what you know about forests and fish resources in a graphic organizer like the one below. As you read, write what you learn.
1. Forests provide people with lumber and paper.2. Commercial fishing boats harvest large amounts of fish.
1. Forests can be renewable resources.2. Setting fishing limits, changing fishing methods, and
developing aquaculture techniques are ways to manage fisheries for sustainable yields.
- Forests and Fisheries
Using Prior Knowledge
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Complete Section Assessment p. 95 as well as guided reading.
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End of Section:Forests and
Fisheries
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What organisms live in our area?• With your partner list as many organisms that you can
think of that live near your home. (5 mins)
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Which area is more likely to have a higher biodiversity- Tropical Rainforest or Earth’s
Poles?
• Why?
• Why does a coral reef have such a diversity?
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Biodiversity and Economics• How can an entire ecosystem be used to generate
income?
• In your groups you will be assigned one ecosystem. Please brainstorm how you could make money using the resources in the ecosystem.
RainforestSavannahCoral ReefMarineAquaticForestUrbanMountain
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Diversity and Survival of Species• What are genes?
• Genes determine characteristics of all organisms.
• Why is this important?
What is the Gene Pool of a species?
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Endangered Species• 1) What are they?
• 2) Why does it happen?
• 3) What can we do to prevent it?
Get into 3 even groups
Group 1 answer #1Group 2 answer #2Group 3 answer #3
Report to the class
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Diversity of SpeciesThe number of different species in an area is called its biodiversity.
- Biodiversity
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Factors Affecting BiodiversityFactors that affect biodiversity in an ecosystem include area, climate, and diversity of niches.
- Biodiversity
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California Peregrine Falcon Recovery
The peregrine falcon, the world’s fastest bird of prey, was nearly extinct in the United States in 1970. The pesticide DDT was weakening peregrine eggshells, so eggs rarely hatched. In 1972, the United States banned DDT. Use the graph to answer questions about the peregrine population in California.
- Biodiversity
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California Peregrine Falcon Recovery
Time interval in years is on the x-axis. Number of breeding pairs of peregrine falcons is on the y-axis.
Reading Graphs:
What variable is plotted on the x-axis? What variable is plotted on the y-axis?
- Biodiversity
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California Peregrine Falcon Recovery
The population grew steadily, except for a brief drop around 1980, until 1994, when the number of breeding pairs remained the same for the four following years.
Interpreting Data:
How did California’s peregrine population change from 1976 to 1998?
- Biodiversity
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California Peregrine Falcon Recovery
There were only a few breeding pairs at first, and they could produce only a few young. These, in turn, had to grow up before they had a chance to breed. As more pairs grew to breeding age, more and more young could be produced.
Inferring:
Why do you think the peregrine population grew fairly slowly at first?
- Biodiversity
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California Peregrine Falcon Recovery
The graph probably would have sloped downward from left to right, possibly reaching zero breeding pairs.
Predicting:
What might this graph have looked like if DDT had not been banned?
- Biodiversity
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Endangered Species
Click the Video button to watch a movieabout endangered species.
- Biodiversity
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Building VocabularyAfter you read this section, reread the paragraphs that contain definitions of Key Terms. Use all the information you have learned to write a meaningful sentence using each Key Term.
- Biodiversity
Key Terms: Examples:
biodiversity The biodiversity of ecosystems can have great economic value.
keystone species A keystone species is a species that influences the survival of many other species in an ecosystem.
gene Genes are the structures in an organism’s cells that carry its hereditary information.
extinction The disappearance of all members of a species from Earth is called extinction.
endangered species Species in danger of becoming extinct in the near future are called endangered species.
Key Terms: Examples:
threatened species
habitat destruction
habitat fragmentation
poaching
captive breeding
Species that could become endangered in the near future are called threatened species.
The major cause of extinction is habitat destruction.
Breaking larger habitats into smaller, isolated pieces, or fragments, is called habitat fragmentation.
The illegal killing or removal of wildlife species from their habitats is called poaching.
Captive breeding is the mating of animals in zoos or wildlife preserves.
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End of Section:Biodiversity
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Question Answer
Asking QuestionsBefore you read, preview the red headings. In a graphic organizer like the one below, ask a what, how, who, when, or where question for each heading. As you read, write the answers to your questions.
Why is biodiversity important to medicine?
Biodiversity is important because there may be undiscovered medicines that exist in nature.
What is the story of taxol? Taxol is a cancer treatment drug that comes from the bark of the Pacific yew tree. Scientists are concerned about the supply of this tree.
How can we increase the supply of taxol?
Today taxol can be reproduced in the lab.
- The Search for New Medicines
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End of Section:The Search for New Medicines
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Graphic Organizer
Ecological value
Biodiversity
is valued for
is threatened by
can be protected by
Economic value
Habitat destruction Pollution
Laws
Captive breeding
Habitat preservation
Poaching Poaching
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End of Section:Graphic Organizer