Characteristics of Life - Get Now PowerPoint by bAOnvJK

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									 Characteristics of Life

What are the characteristics of all
          living things?
            Dead or Alive?
• It is not always an easy thing to tell the
  difference between living, dead, and non-
  living things. Prior to the 1600's many
  people believed that nonliving things could
  spontaneously turn into living things. For
  example, it was believed that piles of straw
  could turn into mice. That is obviously not
  the case. There are some very general
  rules to follow when trying to decide if
  something is living, dead, or non-living.
         Proving Biogenesis
• Biogenesis: All living organisms originate
  from other living organisms.
• Redi’s experiment
  – Transparency #1
    The Characteristics of all Living
              Things.
•   Living things are made of cells.
•   Living things obtain and use energy.
•   Living things grow and develop.
•   Living things reproduce.
•   Living things respond to their environment.
•   Living things adapt to their environment.
 Living things are made of cells
• Antony Van Leeuwenhoek built a simple
  microscope over three hundred years ago.
  He used it to discover single celled
  organisms swimming around in pond
  water.
Living things obtain and use energy
• The Food Web
 Living things grow and develop
• Cells in your body have grown, died and
  reproduced since you sat down in this
  classroom.
• The same thing happens in all living things
      Living things reproduce
• Asexual
• Sexual

• Yes, we are going to talk about
  reproduction!
    Living things respond to their
             environment
• What do many
  plants do when the
  amount of sunlight
  is reduced for
  certain times of the
  year?
     Living things adapt to their
             environment
• What do you do when it gets cold outside?
• What do you do when it gets warm
  outside?
               Conclusion
• If something follows one or just a few of
  the rules listed above, it does not
  necessarily mean that it is living. To be
  considered alive, an object must exhibit all
  of the characteristics of living things.
  Sugar crystals growing on the bottom of a
  syrup container is a good example of a
  nonliving object that displays at least one
  criteria for living organisms.
               Homework
• Find 5 examples of nonliving objects that
  display living characteristics?

								
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