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What do we need for life like us?. planet star What is a star needed for? energy. Solar Energy. plants solar energy used to make complex molecules food animals eat plants for energy wood solar energy stored in chemical form fossil fuels coal oil nat gas plants and animals

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What do we need for life like us?


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    1. What do we need for life like us? planet star What is a star needed for? energy

    2. Solar Energy plants solar energy used to make complex molecules food animals eat plants for energy wood solar energy stored in chemical form fossil fuels coal oil nat gas plants and animals hydroelectric sun lifts water wind sun drives wind

    3. Solar Energy nuclear fission uranium underground supernova geothermal Iceland Calistoga geysers planet tidal high tide fills bay low tide empties moon What doesn’t come from our environment?

    4. temperature/speed average speed some slower some faster some much faster temperature bombardment pressure blown

    5. 1H 2H 3H 4He 3He Ionized Isotopes

    6. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

    7. Nuclear Forces repulsive attractive weak strong long range close range

    8. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

    9. E=mC2 e+ e- + Proton-Proton Chain n + 1H 1H 2H e+ + + mass charge proton high + neutron high 0 electron low - positron low + matter anti-matter annihilation matter → energy

    10. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

    11. n + 6 sec g + + 2H 1H 3He Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He

    12. n + + 1H 1H Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He + 3He 3He + 4He

    13. Radiation Conduction Convection Transparent Contact & Good Conductor Fluid or Gas Energy Transport What conditions are required?

    14. Random Walk

    15. Star Forming Region

    16. Star Forming Region

    17. Star Forming Region

    18. Star Forming Region

    19. Star Forming Region

    20. Star Forming Region

    21. Star Forming Region

    22. Star Forming Region

    23. Star Forming Region

    24. Star Forming Region

    25. Star Forming Region

    26. Protostars

    27. Protostars

    28. Protostars

    29. Gas Cocoon Protostar

    30. Lost Potential Energy Gaining Kinetic Energy Gaining Speed Gas Cocoon Gas Rising Temperature Gravity pulls inward. Some other force pushes out. Gas pressure pushes outward. Stops Collapse

    31. Cocoon Where is the temperature highest?

    32. Radiation Cools Protostar Heats Cocoon Escape Velocity? Convection

    33. Cools Protostar Heats Cocoon Escape Velocity?

    34. Cools Protostar Heats Cocoon Escape Velocity? Protostar Collapse

    35. Stellar Wind Sheds Outer Layer Mass Loss

    36. Stellar Wind Sheds Outer Layer Mass Loss

    37. Stellar Wind Sheds Outer Layer Mass Loss Collapse Continues

    38. Convection? Core Energy Transport Slows

    39. Core Fusion H He

    40. g n e+ + g CNO Cycle + + 1H 13N 12C + 13N 13C + 13C 1H + 14N

    41. g n e+ + CNO Cycle + 14N + 1H 15O 15O + 15N 15N + 4He 1H 12C +

    42. Stellar Wind Cocoon Gone Star Exposed

    43. First star disrupts later stars.

    44. n + + 1H 1H Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He + 3He 3He + 4He

    45. Long Main Sequence Life Millions of Years for Some Billions of Years for Others Mostly Stable Energy Output Mostly Stable Size Gradual Increase in Both Core H He