What are some sites or places that you have been to or have heard about that are characteristic of having extreme conditions very hot very cold very dry What about extreme conditions around us on a daily basis or where we live in kitchen our bodies etc ID: 917619
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Slide1
EXTREMophiles!
Finding Life on other Planets
Slide2-What are some sites or places that you have been to or have heard about that are characteristic of having extreme conditions (very hot, very cold, very dry)? -What about extreme conditions around us on a daily basis or where we live? (in kitchen, our bodies, etc.)
Slide3What do you consider to be an ideal Environment for you?Temperature?
70-80 degrees Fahrenheit?
Climate?
Warm? Sunny? Breezy?
Geography?
Mountains? Forest? Flat/Grassland?
Slide4Slide5What about living in……boiling water?…living in acidic water that can eat through metal (your stomach!)?…in mud that is saltier than the ocean?
…in volcanic hot spots?
Slide6Slide7So what could possibly live in these kind of environments?
Slide8Common Examples of ExtremophilesMicrobes—bacteria and archae
Mostly unicellular, but some
multicellular
include particular worms, insects, and crustaceans
Slide9EXTREMOPHILEExtreme–
being of a high or of the highest degree or intensity
–
phile
“love”, attraction, or affinity to something
“Extreme-lovers”
<3
Slide10What is an Extreme Environment?High-Salt (>0.2M salt concentration)halophiles
Low pH (<3)
acidophiles
High pH (>9)
alkaliphiles
Slide11High-temperature (176–300 °F)thermophiles
Low-temperature (< 50 °
F; as low as -450 F)
psychrophile
High-pressure
Slide12A Polyextremophile: the “water bear”
Hypoliths
Slide13What are some Examples of Extreme Environments here on Earth?Volcanic areas (hot spots)Geysers
Hot springs
Hydrothermal vents
(deep sea)
Slide14What is Mars’ Environment Like?Like Earth’s extreme environments, the entirety of Mars’ is “extreme”Dry, frozen desert
Slide15How Similar do You Think Earth is to Mars?
Slide16Comparing Earth and MarsBoth have large
polar caps
Similar solar day
Both have a similar
rotational
tilt in their axis (similar seasons)
Carbon, nitrogen, water (but not liquid now)
The magnetic field of Earth makes it’s largest characteristic in difference
Mars is much colder
http://www.nasa.gov/vision/earth/lookingatearth/Sibling_Rivalry.html
Slide17Life on Mars?Evidence that Mars once had water, maybe even oceanspossibly at the same time Earth first had life. So what happened to Mars, then?
Mars “lost” its atmosphere; was mostly CO2, turned into carbonate and mineralized in rocks
Thicker atmosphere=stabilize water, warme
r climate
Our atmosphere is maintained from recycling of plate tectonics
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