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What makes a world habitable?

What makes a world habitable?. What makes a world habitable?. What makes a place habitable? Think of life forms and what they need to survive here on Earth. REMEMBER… life comes in all shapes and sizes… from a tiny microbe, to a human being

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What makes a world habitable?

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  1. What makes a world habitable?

  2. What makes a world habitable? • What makes a place habitable? • Think of life forms and what they need to survive here on Earth. • REMEMBER… life comes in all shapes and sizes… from a tiny microbe, to a human being • In your group, come up with 5 things that a world needs to have in order for life to exist there

  3. What makes a world habitable? • Temperature • Liquid water • Atmosphere • Energy • Nutrients

  4. 1. Temperature • 0to 120 ºF (20 to 50 ºC) • High temperatures breakdown DNA • Low temperatures slow down metabolism

  5. Lut Desert, Iran • Hottest inhabited place on Earth at 159 °F (71 °C)

  6. Oymyakon, Russia • The coldest inhabited place on Earth • -46 °C (-51 °F) average

  7. -42 °F

  8. 2. Liquid Water • All living organisms require LIQUID water • Between 35 and 100 ºF (2 to 38 ºC)

  9. 3. Atmosphere • Protection from Meteorite impacts • Greenhouse gases • Keep heat in • Ozone Layer • Protection from UV radiation

  10. Greenhouse Gases • Too many = too hot • Too few = too cold

  11. 4. Energy • Light or chemical energy is needed for life processes • Photosynthesis is the main way energy enters ecosystems

  12. 5. Nutrients • A constant supply is needed for life • Processes that provide nutrients • Matter Cycles • Volcanoes • Earthquakes

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