Geology chp 8

• bands of dark red and light grey rust.
• red=iron oxide
• grey=precipitaed quartz

bacteria that splits carbon dioxide into carbon and free oxygen

break H20 in hydrogen and Oxygen

filters ultraviolet radiation and prevents dissociation

water vapor released from rocks. Occured first billion years of earth. Heat does it.

• survive heat and reach the ground.
• Are astroid fragments

• least abundant
• made of silicate minerals and iron nickel

iron nickel. Probably from asteroids large enough to have metallic cores

• most abundent
• 4.56 billion years old. Archean
• contain chondrules-which are solidfied molten droplets

• early carbon blocks for earth
• may have supplied organic building blocks for life

stream of radiation from the sun

• once accretion has happen(particles coming together but not condensed yet)
• giving rise to planets

dust cloud particles pulled by gravity then clumps of matter formed. The larger one swept up other particles within its path

• solor system origin
• Immanuel Kant
• shrinks and forms disk
• most material concentrated to the center forming the sun
• smaller particles form planets and moons and asteroid belts

rotating cloud of dust particles and gases

• older than the cambrian period
• divided into two=archeon eon and proterozioic=best dating with radiometric

proposed Hadean. the oldest

• Precambrians rocks/oldest parts of continents=shields
• north american shield is=canadian shield

water is recycled by evaporation and precipitation

• continental crust.
• 4.4 billion years ago
• decending slabs melted then some rose to surface and cooled
• granite

• Oceanic crust
• 4.5 billion years
• melting of the upper mantle

• layer by sedimentary rocks
• stable tectonic conditions
• paleozoice, mesozoice, cenozoice

platforms and shields of a continent

• divinding the canadian shield
• based on age of rocks, characteritic folding style, directional trends of faults and folds

possible ocean during the archeon period

• rocks of the lunar highlands
• formed from the cooling magma ocean
• earliest time of plate techtonics

• enormous amount of heat
• maybe from the bombardment of meteorites
• radioacitve isotopes

• three layers core, mantle and crust
• each layer different chemical composition and density
• internally zoned

Galileo saw them

lighter hued craggy and heavily cratered regions of the moon

• darker areas of the moon
• floors of immense basins with basaltic lava

group of archean rocks

granite rocks heat

• composed of volcanic and metamorphosed sediments
• basaltic extrusive igneous rocks

characteristic of greenstones

they are microbes that live off energy from heat by radioactive decay

• make own food
• organism
• uses externaml souce of energy to produce organic nutrients from simple inorganic chemicals

past neptune, used to be pluto, spherical shape due to gravity

• cant make own food
• scavenge nutrients in their own enviornment

• does not require oxygen
• germentation to obtain energy

• rely on oxygen to live
• use oxygen to convert food into energy

use sunlight to power the dissociation of carbon dioxide into carbon and free oxygen

• thrive in seawater
• microbes
• can live in deep fissures below vents

• oxidizing such inorganic substances as hydrogen sulfide or ammonia
• possible first organisms chemotrophes

lack membrane bounded nuclei and other membrane bounded organelles

• cantains true nucleus enclosed with a nuclear membrance
• well defined chromososomes and organelles

calcium carbonate having rounded branching or frondose shape. formed as a result of the metabolic marine algae

organic molecules that only eukaryotes can synthesize

bodies capable of performing specific functions

pressure and temp within the suns core attained critical levels so hydrogen atoms began to fuse together