2 - Oldest Shelled Organisms = 535 Million years...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
03:14 1.6 km = 1 mile 0.6 mi = 1 km 7 mm = 1 m Power of 10 (Powers –how many zeroes) 10 0  = 1 10 = 10 10 2  = 100 10 3  = 1000 10 = 1,000,000 10 9  = 1,000,000,000 10 -1  =0.1 Earth/Solar System is about 4.6 Billion Years Old Universe  Big Bang occurred about 12 billion years ago Radiometric Dating   Radioactive Decay 1940s – 1950s of absolute time scale The radiometric date is based on ration of parent to stable daughter elements Radio active element decays (1/2 lifes) 40 K   40 Ar    ½  life = 1.19 x 10 10  years for K to turn into Ar 14 C   14 N   ½  life = 5,570 years for C to turn into N Ex: 230 U   208 PB
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Decay   into Lead SEE DIAGRAM 1 Oldest Rocks on Earth = 3.8 billions of years ago (Ga) Oldest Minerals on Earth = 4.2 Ga
Image of page 2
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Oldest Shelled Organisms = 535 Million years ago (Cambrian Explosion) Oldest Rocks on earth are always on CONTINENTS Oldest Rocks in oceans are only about 200 Million years old CA state rock = serpentile Meteorites = meteors that hit earth Date meteorites = 4.6 Ga “Carbonaceous Chondrite” Primitive Stony Meteorites (not metallic) Has never experiences temperatures greater than 200 degrees Celsius Have never been part of a planet or large asteroid Thought to give the best guide to the original abundances of the elements in the solar system Contain 20% water and volatile compounds which suggests that they have never undergone excessive heating 03:14 03:14...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern