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Humans In The Biosphere Section 6-2

Renewable and Nonrenewable Resources

Merp

Changing landscape

Hunting and Gathering

  • Nearly 1600 years ago, Polynesians began to settle in the Hawaiian islands.
  • People farmed and fished
  • Polynesians maintained their ecosystem
  • In late 1700's, the settlers came including Americans, Asians, and Europeans.
  • Our ancestors obtained food only by hunting and gathering food.
  • Hypothesis said that in 12,000 years ago on the North the animals extincted.
  • North animals left from there.

Earth as an island

  • History in Hawaii offers important lessons
  • An organism that lives on earth share a limited resource base and depend on it
  • To protect, humans need to understand the biosphere

Earth as an island

  • In a sense, earth is an island
  • Hawaii offers important lessons for the 21st century
  • We all rely on the natural ecological process that sustain these resource

Human Activities

  • Like all organism, humans are in the food web chain.
  • We depend on ecological life support
  • ecosystem process provide us with services

Agriculture

  • Years ago early hunters found out how plants grow and made them as food and medicine.
  • Now they use it for animals.
  • Stable communities including towns and cities, enable that develop government, laws and writing.

Challenges for the Future

Sect.2:Renewable and Nonrenewable Resources Vocabulary:

  • First, Increasing world food supplies, modern agriculture has created challenges.
  • When insects population is surrounded by food, population can grow rapidly.
  • Second, Finding enough water for irrigation.

Ex: depends on underground water deposit

Green Revolution:

The development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops.

1.Renewable sources: Resources that can regenerate quickly and that are replaceable

desertification :

in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert

Deforestation

The loss of forests.

Nonrenewable Resources:

Resources that cannot be replenished by natural processes

Smog: Mixture of chemicals that occur as a gray brown gaze in the atmosphere

Soil Erosion:Wearing away of surface soil by water and wind

ACID RAIN

Sustainable Development:

From Traditional to Modern Agriculture

rain containing nitric and sulfuric acid

POLLUTANT :

a way of using natural resources at a rate without depleting them and of providing for human needs with out causing long term environmental harm

a harmful material that can enter the biosphere through land, air , or water

The Green Revolution

  • Drills for cultivation
  • Europeans began to grow crops first
  • They put a chemical on the crops to kill or control damaging insects.

Freshwater Resources

Ch.6 Sect.1-2 Assessment

  • In the middle of the twentieth century, food storage's in many parts of the world
  • India and China, world's largest population, produces and got food to feed people
  • 50 years, the green revolution has helped food production.

Americans use billions of fresh water daily for everything from drinking ans washing to watering crops and making steel

Air Resources

Match the following terms with its correct letter:

1. The practice of farming.

2. Rain containing nitric and sulfuric acids.

3. Farming strategy in which large fields are planted with a single crop, year after year.

4. Destruction of forests.

5. Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases.

6.Mixture of chemicals that occurs as a gray-brown haze in the atmosphere.

Sect.1: A changing landscape Vocabulary

Pollution threatens water supplies with things such as discarded chemicals, wastes, and sewage

Ch.6 Sections 1-2 Vocabulary/:

Fill in the blank

7. Nearly years ago, Polynesians began to settle in the Hawaiian islands.

8. Our obtained from only hunting and gathering.

9. The forest is also knows as .

10. Forests provide a and for organisms.

11. When removing then it's most likely to have a soil erosion.

12. resources cannot be replaced naturally.

Agriculture:

The practice of farming

13. A variety of trees are growing faster and produce .

a. Deforestation

b. Smog

c. Acid Rain

d. Green Revolution

e. Agriculture

f. Monoculture

Air is a common resource that we use every time we breathe.

They can enter the water supply directly or can seep into the ground and enter the groundwater

The preservation of air quality is a challenge for modern society

Monoculture:

A farming strategy in which large fields are planted with a single crop, year after year

Forms of pollution include smog, and acid rain which are pollutants

Classifying Resources

Forest Management

Key Concepts:

* Environmental resource and service can be labeled as a renewable resource or a nonrenewable resource

ex: a tree is a renewable resource

oil is a nonrenewable resource

Why ? If a tree dies or is cut down, another tree can grow to replace the other tree

* However, a renewable resource has limits

* nonrenewable resources cannot be replaced naturally

ex: fossil fuel coal, oil, natural gases, etc.

Fishery Resources

Section 1:

  • What types of human activities can affect the biosphere?
  • Among the human activities that affect the biosphere are hunting and gathering, agriculture, industry, and urban development.

Sustainable

Development

Fish and other animals that live in the water are a valuable source of food for humanity

Between 1950 and 1990 the world fish catch increased from 19 million tons to 90 million tons which decreased the haddock and cod populations

Fish were considered a renewable resource, but now are considered a resource that cannot be harvested indefinitely

* in some areas, where the trees have been cut, foresters plant, manage, harvest, and replant trees

* a variety of trees are growing faster and produce high-quality wood

Land Resources

Section 2:

  • How are environmental resources classified?
  • Environmental goods and services may be classified as either renewable or nonrenewable.
  • What effects do human activities have in natural resources?
  • Human activities can affect the quality and supply of renewable resources such as land, forests, fisheries, air.

* Human action may affect the quantity of renewable resources

ex. forests, fisheries, air, fresh water,

etc.

* sustainable development must be aware of the functioning ecosystems and how human systems process

* Land is an important resource

* gives space to grow crops

* crops grow better when using soil

* when removing roots ( which is what holds the soil in place ) its more likely to have a soil erosion

Soil

Worldwide, about half of the area originally covered by forests and woodlands has been cleared.

Forest Resources

Why Does Soil Matter?

Deforestation

* wood from forest is being used to make products from houses to paper

* the forest aka “ lungs of the earth “ ( called that because they remove carbon dioxide and produce oxygen )

* forests provide habitats and food for organisms, moderate the climate, help limit soil erosion, and protect freshwater supplies

* loss of forest

* can lead to severe erosion when soil is the soil is exposed to heavy rains

* grazing and plowing = permanent changes

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