Geological Hazards and Their Impact_McGeary_Date_040510

Geological Hazards and Their Impact_McGeary_Date_040510 -...

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Exam 2: Monday April 19 Tsunami Volcanoes Impacts Landslides tectonic hazards hazards related to earthquakes, volcanoes, tsunami - energy is expended - energy is provided by the earth’s heat energy surface hazards energy is provided form solar radiation impacts extraterrestrial ch. 17 in book - solar system formation left over debris (dust, small rocks, gases) 1) asteroids smaller than a planet, bigger than a meteoroid come form inner solar system (asteroid belt) have a circular orbit made up of “space rock” (is basically a failed planet) velocity is 15-25 km/s 2) meteoroids less than 10 m across iron meteorites made up of iron similar to Earth’s core (about 6% of all
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Unformatted text preview: meteorites) iron-stony meteorites only 1% stony meteorites made up of stone similar to Earths mantle (about 93%) meteorites- meteoroids that hit the Earth 3) comets made up of ice, dust, and rocks tail (or coma) is the solar radiation or solar wind hitting the comet highly eccentric (elliptical) orbit most come from the Oort cloud (outer solar system) leftover debris (solar system formation, ice, rocks) less dense than asteroids velocity is 60-70 km/s - energy released during an impact is about (1/2)mv 2 - large impacts objects (such as asteroids and comets) are called bolides...
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