Chapter 2 Sustaining What the Environment Provides

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Chapter 2Sustaining What the Environment Provides

• Objectives
• Described how the environment sustains life and
  the role of sustainable resource use
• Name and explain the basic life needs that the
  environment provides for living organisms
• Identify the three roles of humans in the
  environment
• Describe the environment as home, including
  ecosystems, habitats, and food webs

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Terms

• Conservation
• Ecosystem
• Food
• Food chain
• Food web
• Habitat
• Hypothermia
• Nutrient
• Quality of life
• Respiration
• Shelter
• Space
• Sustainable agriculture
• Sustainable development
• Sustainable resource use
• Sustaining life
• Territory

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Ask Yourself

• What do I need to live?
• How does the environment help provide these needs?

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Sustaining Life

• Organism require certain things to live that
  provided by the environment
• Conditions are no longer provided, life may not
  be possible
• Using resources so they last a long time
• A person should use no more than is needed
• No resource should be wasted

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Sustainable Resource Use

• Is using resources so they last a long time
• The resource is renewed, reused, and recycled as
  best as possible
• Proper conservation practices are used

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Sustainable Development

• Is to assure the best possible future
• All development is carried out for the best
  long-term benefits to society

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Sustainable Agriculture

• Involves using practices that assure the future
  ability to produce crop and livestock
• Soil conservation practices are used to prevent
  loss and damage
• Pesticides are used only as need and as approved
• Wastes are properly disposed of and are not
  dumped on the land nor in streams
• Area are provided for wildlife to live and grow

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Having Good Quality of Life

• Quality of life is having a good environment in
  which to live
• Environment provides for the needs of people
• Example,they have clean air to breathe,
  unpolluted water to drink, and feel safe

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Life Needs

• The major needs of living things are
• Food
• Water
• Air
• Space
• Protection or shelter

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Food

• Food is nourishment and is need for energy and
  growth
• Organisms obtain nutrients from food substances
• Common nutrients are proteins, carbohydrates,
  fat, minerals, and vitamins
• Damage to environment can result in food that is
  contaminated with dangerous materials

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Water

• All living things required water to survive
• Most nutrients dissolve in water to diffuse into
  the cells
• If people do not get sufficient water, they
  become dehydrated
• Dehydration is the removal of water from cells
  and organs
• People get sick and required fluids back into
  system

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Air

• Air is a mixture of gases that includes oxygen
• Aerobic means to live where free oxygen is
  available
• Anaerobic means to live where is not free oxygen
• Human live in an environment with about 21
  percent oxygen in the air

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Space

• Space is the area around an organism that it uses
  for living
• Space includes air, area for activity, food
  sources, and places for shelter and protection
• Territory is the area an animal uses and protects
  as its own

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Shelter and Protection

• Organisms sometimes need protection from the
  environment
• Humans use clothing and housing to protect
  themselves from the weather
• Greenhouse are used to provide a controlled
  environment for growing plants

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Roles of Humans

• Humans have three roles

• Humans are resource users
• Humans can make decisions about resource use
• Humans can prevent waste

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The Environment as Home
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Ecosystem

• An ecosystem is all of the parts of a particular
  environment
• It is a community of living organisms and
  nonliving materials
• Ecosystems can be large or small
• Ecosystems are continually changing

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Habitat

• Habitat is the physical area where an organism
  naturally lives
• It is the proper arrangement of four essential
  elements food, water, shelter, and space

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Energy Transfer

• Organisms must have energy to move about and
  carry out life functions
• All of the energy in an ecosystem originates with
  the sun
• Plants use sunlight and the process of
  photosynthesis to make food

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Food Chain

• Energy is transferred from one organism to
  another in the food chain

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Food Web

• A food web is all the interconnected food chains
  of an ecosystem
• A plant may be eaten by more than one animal
• The animals may be the prey of other animals
• Finally, plants and animals die and their remains
  decay and are returned as nutrients to the soil

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Tests

• How is quality of life affected when resources
  are damaged?
• What are the major life needs of living
  organisms?
• Why are these important?
• What are the roles of humans in relating to the
  quality of the environment?
• What relationships exist among ecosystems,
  habitats, and food chains?