Date post: | 25-Jun-2015 |
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Education |
Upload: | all-saints-science |
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Are Are we we alonalone?e?
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eextraxtratterrestrial lifeerrestrial life• life other than that on Earth
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favorable favorable conditionsconditionsneeded forneeded forlife as welife as we know itknow it
liquid liquid waterwater
suitable suitable temp.temp.
range &range &atmosphereatmosphere
sunlightsunlightor otheror otherenergyenergy sourcesource
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Goldilocks conditionGoldilocks condition
•temp. not too hot- not too cold
• Earth = just right
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Extreme Conditions- bacteria in hot springs
show that range of conditions in which life can exist - much greater than scientists once thought
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Life on MarsLife on Mars Life on EuropaLife on EuropaViking missions-
tested air & soil for signs of life
moon of Jupiter
areas on Mars looked like stream beds w/
paths of water- possible evidence
may have had running water
Voyager & Galileo missions
possibly fossils in meteorite
covered by layer of ice-possibly liquid H20
under
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VIKING ORBITER VIEW OF MARS
surface of Mars looks like streambeds w/ crisscrossing paths of water – maybe Mars had flowing water??
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possible fossil bacteria in Mars meteorite
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Scientists have discussed sending a robotic probe to search for life in the ocean below Europa’s icy crust.
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So, is there life beyond Earth?
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2. Extraterrestrial Paragraph
•Name of extraterrestrial•Where it comes from•What it eats•How it lives in its environment
1. Make an extraterrestrial