Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
What are the 3 periods of the Precambrian Era?
|
Hadean (Oldest), Archean, Proterozoic (Youngest)
|
|
|
What occured during the Hadean Period of the Precambrian era?
|
earth began to form, there was no oxygen
|
|
|
What occurred during the Archean period of the Precambrian era?
|
the first life forms come during this time, the first continents and oldest rock forms are created
|
|
|
What occured during the Proterozoic period of the precambrian era?
|
first major extinction during this time, 1st eukaryote (cell with nucleus), formation of redbeds causing oxygen level to increase
|
|
|
What are Redbeds?
|
rocks containing iron that went under oxidation, proving the development of oxygen in the atmosphere
|
|
|
What are Tillites?
|
glacial deposits, proving the earth had cooled down enough to form ice
|
|
|
What are ophiolites?
|
indicates continent on continent collisions
|
|
|
What was millers experiment?
|
Made an artificial atmposphere to explain life, wasn't the most effective.
|
|
|
What was photosynthesis, and what is its formula?
|
producing food off chlorophyll, sunlight and carbon dioxide.
CO2+ H2O= Sugar & O2 which is food |
|
|
What were Eukarayotes, and what was the signification of them?
|
biggest step in evolution, eukaryotes evolved from prokarayotes which had no membrane and was fully dependent on atmosphere to live. Eukarayotes were complex cells
|
|
|
What is Orogeny?
|
the building of mountains geologically
|
