1 / 15

Precambrian Era…

Precambrian Era…. By: Lara Susana L., Maria Paula V., Andres Felipe G. -- Pablo Jose O. Earth formed as cosmic debris collided . Asteriods struck Earth . The entire globe melted. How did the Earth form?. Violent volcanic activity . Earth cooled 4.2 billion years ago.

talon-pena
Download Presentation

Precambrian Era…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Precambrian Era… By: Lara Susana L., Maria Paula V., Andres Felipe G. -- Pablo Jose O.

  2. Earthformed as cosmicdebriscollided. • AsteriodsstruckEarth. • Theentireglobemelted. How did the Earth form?

  3. Violentvolcanicactivity. • Earthcooled 4.2 billionyears ago. • Watercondensed and rain fell • Oceansformed • Therewaslittleoxygen, justother gases. How was earth back then…

  4. Theskywas a piknish-orange color • Theoceanswerebrown How did it look…

  5. 200-300 millionyearsago… Mixtures wehavenow (amino acids) Developedfromsimplercompounds Microspheres: Cells similar to bacteria Developedcharacteristics of living cells Selectively permeable membranes Simple means of storing and releasingengergy First Molecules… About 3.8 BILLION yearsago!

  6. Lots of photosynthetic Bacteria. • Madelots of oxygen. • Oxygenmixedwithiron in theoceans and createdrust. • Rustsunktothebottom of theocean. • Ocean color changed. Oxygen?

  7. Oxygencreatedthe ozone layer. • Tons of organismsbecameextinct. Oxygen?

  8. OurAncestors… Endosymbiotictheory Prokaryoticcellsenteredancienteukaryoticcells Developed a symbioticrelationship. Mitochondria Evolvedfromprokaryotesthatusedoxygentocreate ATP Chloroplasts Evolvedfromprokaryotesthatcouldphotosynthesize.

  9. *http://www.humboldt.edu/natmus/lifeThroughTime/PreCam.web/index.htm*http://www.humboldt.edu/natmus/lifeThroughTime/PreCam.web/index.htm *http://www.google.com.co/imgres?q=precambrian+era&hl=es&gbv=2&biw=1366&bih=643&tbm=isch&tbnid=DXgvks3kqtlE1M:&imgrefurl=http://timerime.com/es/periodos/709896/Precambrian%2BTime/&docid=2Im_4SyhnHfWvM&w=350&h=243&ei=2VppTuWWH4y-tge80LHLBQ&zoom=1 *http://www.geocaching.com/seek/cache_details.aspx?guid=0f39889e-c46d-4010-a976-f7caaadd8d56 *http://fromthepaganvastlands.blogspot.com/2011/03/ocean-precambrian-2007.html *http://www.geocaching.com/seek/cache_details.aspx?guid=0f39889e-c46d-4010-a976-f7caaadd8d56 *http://timerime.com/es/periodos/533778/preCambrian+Era/ *http://bldgblog.blogspot.com/2007/04/precambrian-motorways.html

More Related