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Biology: study of living things how they work how they interact with the environment how they change over time

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Biology:study of living things

    • how they work
    • how they interact with the environment
    • how they change over time
    • Included in this is are many specific areas of study such as medicine, nutrition, genetics, physiology, microbiology, ecology, environmental studies, evolution and biochemistry (just to name a few).
living vs non living
Living vs. Non-living
  • Two main components of the environment.
    • Abiotic-
      • Examples?
    • Biotic –
      • Examples?
energy is a big deal
ENERGY IS A BIG DEAL
  • Living things must obtain nutrients and energy
  • Why do we need to do this?
  • The “stuff” we eat/use for energy moves us into the abiotic world and a little chemistry
chemistry explains what life is made of
Chemistry explains what life is made of!
  • We are made of matter - anything that has mass (takes up space no matter how small).
  • We use Energy to do work – Energy isn’t matter, however we can get it from matter
  • All the matter is made up of tiny particles called atoms
what really matters for life
WHAT REALLY MATTERS FOR LIFE???
  • Only a few types of atoms (called elements) are used to make up most of a living thing
    • CHONPS are the major ones!
  • These atoms are not yours alone! They have been shared with the environment and other living things!
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The atmosphere:
    • 79% nitrogen
    • 20% oxygen
    • 1% other gases. The other gases include Argon, (Ar), carbon dioxide (CO2), methane (CH4) as well as many others.
how do we share
How do we share?

These major atoms are recycled

Constantly: C, H, O, N, P and water all cycle between biotic and abiotic parts of our environment.

other important abiotic factors
Other important Abiotic factors
  • Soil: primarily made of decomposed living things
  • Earth/rock: fits into geology, but essential to formation and structure of our planet
    • Even rocks cycle. How??
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In other words, the same types of atoms can be combined differently to make both living and non-living things!