World's most versatile flashcards

or...
Reset Password Sign Up

Geology 112 Word Scramble

 
 

Display or edit notes related to this set of data
Notes
Study using flashcards to flip through data one card at a time
Flashcards
Study using a StudyStack - similar to flashcards
StudyStack
Study all the data at once - click in the table to show or hide the item
Study Table
Study by matching data
Matching
Play the classic guessing game
Hangman
Display a crossword puzzle
Crossword
Play a word scramble game
Unscramble
Type-in-the-blank activity
Type In
Chase down the correct answer to earn points
Bug Match
See how fast you can hit all the targets
Targets
Download this data to your PC, PDA, cell phone, or iPod
Export
Print your data in various formats including a Word Search puzzle
Print
Edit this set of data
Edit
Share this page with someone else by sending an email
Email
Tell us what should go here
Hmm...

 

 
Teachers & Webmasters: If you would like this word scramble activity on your web page, copy the script below and paste it into your web page.
 

 

 

 
Follow us on Twitter
Be a StudyStack fan on Facebook
www.eapps.com



Copyright ©2001-2009 John Weidner All rights reserved.
About -  Terms of Service -  Privacy Statement



Question Answer
The Hadean Time?First 600 Ma, B4 first rocks, time of huge impacts
Oldest rocks4.0 Ba
Oldest mineral?Zircon (western australia) 4.2 Ba
Zircon?A mineral in granite, i.e. the main rock in continents
The oldest rocks?Ultra hot pillow lavas (1600 degrees c) Proves the was already an ocean and earth was hotter below the surface
Source of gas and water?60 - 70% of the gas from volcanos is water vapour, rest is CO2 and N2
How did oceans form?Condensation of water vapour
Composition of early atmosphere?60% carbon dioxide, 30% Nitrogen, 10% argon
Composition of current atmosphere?78% Nitrogen, 21% Oxygen, 1% others
Evidence for oxygen poor atmosphere?Pyrite and uraninite pebbles in ancient conglomerates. Palaoisols are all grey (acient soils), and early oceans had dissolve oxgyen in them which is impossilbe with oxygen in the atm.
Where is oxygen produced?Small amounts in upper atm as UV light splits water vapour up. (photodissociation. Also Photosynthesis.
Evidence for dissolved iron in oceans?Banded Iron formations, formed in shallow marine environments bewteen 3.5 - 2.0 Ba
Progression of Oxygen?3.8 Ba microbes producing O2 in the ocean and precipitiaing BIF's. BIF's stopped at 2.0 Ba and red beds were formed on land, indication oxygen in atm.
Plants invaded continents?0.4 Ba.