whether the sun or the Earth is supplying the most heat to your skin…). We receive shortwave—visiblelight—and send back longwave—infrared.Points Earned:1/1Your Response:A 13.In the photo above, when Dr. Alley slices his finger through the sand, he is recreating on a smaller scale what type of geologic process? A.The action of Chuck Norris karate chopping someone.B.The action of earthworms burrowing in loose soil.C.The action of waves making a beach in Hawaii.D.The action of an earthquake tearing apart continents.E.The action of mass wasting, as soil and rock collapses off of newly steep canyon walls initially carved out by water.Despite any passing resemblence, Dr. Alley is not using martial-arts techniques to extract money from sand. Instead, he is showing how a river carves a canyon, which then widens as mass wasting occurs on the steep new walls.Points Earned:1/1Your Response:E 14. Sam Ascah is standing on sand and gravel in a pothole, where a stream swirls during the short
but intense thunderstorms of Zion National Park. And next to that stream, the other picture shows the sandstone and the hang-on-so-you-don’t-fall-over-the-cliff chain along the trail. A likely interpretation of these features is: The chain really has hung there for decades, and has been scraped against the cliff dozens of times per day each summer, slowly wearing into the easily broken sandstone. The stream does swirl rocks around and slowly wear down the potholes. The potholes were there beside the cliff when the trail wasestablished, and haven’t changed too much over decades.Points Earned:1/1Your Response:EContinueRockOn #5Your response has been submitted successfully. Points Awarded 13Points Missed 1Percentage 93%1.
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- Fall '08
- Earthquakes, rocks, Outer core, Death Valley