Unformatted text preview: varies in its ability to support life due to both climatic differences and shapes and positions of present-day continents presentOcean basins consist of the deep seafloor (13,000(13,00020,000 ft; 4-6 km) and cover most of the earth's surface 4(30%); continents only cover 29% Distribution of land and sea by latitude Hypsographic Curve Elevation areas above And below sea-level Bathymetric Chart of the Sea Floor Physiographic Map of the Sea Floor 3-D Computer Generated Image of the East Pacific Rise The Big Bang Event that occurred approximately 13.7
BILLION years ago All the mass and energy concentrated at a point The universe began expanding and continues to expand After 1 million years matter began to cool enough to form atoms- Hydrogen- the atoms- Hydrogenbuilding block of stars Galaxies and Stars Galaxy- huge rotating aggregation of Galaxystars, dust, gas held together by gravity Earth, the sun and our solar system is part of the Milky Way Stars are massive spheres of incandescent gases (hydrogen and helium) The Solar System Our solar system is located away from the
galaxy's center Our sun and the planets originated from a solar nebula that had been enriched with heavy elements from nearby super novae Solar system is approximately 5 Billion years old Composition is 75% hydrogen, 23% helium and 2% other materials Formation of a Protostar Center contracts Center continues to heat up Protostar radiates more heat Fusion begins in the stars core Shockwaves radiate outward rel...
View Full Document
- Spring '09