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 Earth’s 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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