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

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

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  1. 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).

  2. Living vs. Non-living • Two main components of the environment. • Abiotic- • Examples? • Biotic – • Examples?

  3. 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

  4. 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

  5. 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!

  6. Elements in Earth’s crust vs. humans

  7. 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.

  8. 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.

  9. 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??

  10. In other words, the same types of atoms can be combined differently to make both living and non-living things!

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