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Unformatted text preview: Known species of living things: At least one million, perhaps as many as 10 million: 950,00 animals 215,000 plants 40,000 molds & mushrooms (fungi) 13,000 chromists (diatoms, kelps) 8,000 protozoa (single-cell, animal-like life) Earth's Equatorial Circumference is 40,000 km Earth's Equatorial Diameter is 13,000 km One degree of latitude or longitude = 111 km A minute (1/60th of a degree) = a little less than 2 km Highest mountain top is 9000 m Lowest point on the continents 420 m below sea level Oceans deepest point 11000 m Temperature range is about 60C to -90C Atmosphere: 77% nitrogen 21% oxygen The rest is argon, CO2 & water vapor Earth solid parts (i.e., crust, mantle, & core) 35% Iron 30% Oxygen 15% Silicon 10% Magnesium The rest is Nickel, Sulfur &Titanium...
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- Spring '12