Points Earned: 1/1 Correct Answer: E Your Response: E 1 The two pictures above, I and II, show fossils in rocks from the Grand Canyon. Each is “typical”— 3. the rocks near sample I contain fossils similar to those shown in sample I, and the rocks near sample II contain fossils similar to those shown in sample II. It is likely that: A. Sample I is from high in the cliffs of the Grand Canyon, and sample II is from much lower, near the river. B.Sample I is from high in the cliffs of the Canyon, and sample II is also from high in the cliffs of the Canyon.
C.Sample I is from Graham Spanier’s backyard, and Sample II is from Joe Paterno’s backyard. D.Sample I is from near the river, and sample II is also from near the river. E.Sample I is from near the river, and sample II is from high in the cliffs of the Grand Canyon. Sample I is a wonderful shell hash, or coquina, from the Supai Rocks well up the side of theCanyon, and contains shells from a great diversity of different creatures. Sample II includesalgal-mat deposits (stromatolites) from the Precambrian Chuar Group of the Grand Canyon Supergroup, deep in the Canyon near the river, from a time when biology was not a whole lot more diverse than algal mats. Points Earned: 1/1 Correct Answer: A Your Response: A 14. Geological evidence based on several radiometric techniques has provided a scientifically well-accepted age for the Earth. Represent that age of the Earth as the 100-yard length of a football field, and any time interval can be represented as some distance on the field. (So something that lasted one-tenth of the age of the Earth would be ten yards, and something that lasted one-half of the age of the Earth would be fifty yards.) On this scale, how long have you been alive? If the 4.6 billion years of Earth history are 100 yards, then the few thousand years of written history are just one-millionth of that history, just over the thickness of a sheet of paper. And your small piece of written history must be only a small fraction of a sheet of Points Earned: 1/1 Correct Answer: D Your Response: D Continue Contact Penn State ANGEL Support RockOn #10Submitted by jlw5089 on 11 / 15 / 2007 5:01:46 PM
Points Awarded 10 Points Missed 4 Percentage 71% The next four (4) questions refer to the diagram at right.
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