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Week2 Individual - Nicole Ottiano SCI/151 Moses Olade Week...

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Nicole Ottiano SCI/151 Moses Olade Week 2 Individual Assignment 1. How would you determine the age of rocks by radioactivity? Give an example. Very roughly: by comparing the ratio between a radioisotope and its "daughter product", and with the knowledge of the radioisotope's half-life, calculate the amount of time needed for the observed ratio to develop. In short, if there is a 50-50 split between the radioisotope and its daughter product, one half-life has passed. 2. How can scientists determine the internal structure of the Earth if the depth of the deepest well is only a tiny fraction of the Earth’s diameter? Geologists or seismologists can detect earthquake waves that have passed through the interior of the earth. Based upon how the waves are reflected or refracted, they can tell what material the waves are traveling through, like listening to the earth. The current hypothesis is molten nickel/iron, but it can be changed. 3. Impact cratering, volcanism, tectonics, and erosion are the four major processes that affect planetary surfaces. How would you describe two of these processes? Impact Cratering: In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body. In most common usage, the term is used for the approximately circular depression in the surface of a planet , moon or other solid body in the Solar System , formed by the hypervelocity impact of a smaller body with the surface. Volcanism: Volcanism is part of the process of bringing material from the deep interior of a planet and spilling it forth on the surface. Eruptions also eject new molecules into the atmosphere. Volcanism is part of the process by which a planet
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