Geology (Wave-cut Terraces) 20 Answer Key

Question 1 1 / 1 pts Horizontal, planar, rocky surfaces that form in the surf zone as a result of wave erosion are called ______. backshores barrier islands stacks Correct! wave-cut terraces Question 2 1 / 1 pts The zigzag motion that carries sand grains along a beach is known as ________. Correct! longshore drift meandering refraction turbidity Question 3 1 / 1 pts Which of the following terms describes the region of breaking waves near the shoreline? Correct! surf zone swash zone tidal flat No answer text provided. Question 4 1 / 1 pts The best way to preserve natural beach environments is to ___________. build groins build levee systems truck in sand Correct! leave it alone Question 5 1 / 1 pts A rip current is a strong flow of water moving _______. parallel to the shore at a 60° angle to the shore at a 30° angle to the shore Correct! perpendicular to the shore Question 6 1 / 1 pts Near-shore crest-shaped waves are called __________. surf swell Correct! breakers backwash Question 7 1 / 1 pts Which of the following forms a barricade between the open ocean and the main shoreline? abyssal hills Correct! barrier islands guyots wave-cut terraces Question 8 1 / 1 pts Which of the following is not a shoreline depositional landform? spit barrier island sand bar Correct! sea stack Question 9 1 / 1 pts What causes the tides? earthquakes Correct! gravity ocean currents wind Question 10 1 / 1 pts In Hawaii, the difference between low and high tides is approximately 0.5 m. In the Bay of Fundy in eastern Canada, the tidal range can reach __________. 1.2 m 6m Correct! 12 m 60 m Question 1 1 / 1 pts At the last glacial maximum, sea level was about ______ lower than today. 10 m 130 m 200 m 1000 m Question 2 1 / 1 pts The anomalous warming of the eastern Pacific Ocean that occurs every 3 to 7 years is called ________. Milankovitch cycles La Niña El Niño ENSO Question 3 1 / 1 pts Chemical analysis of ice cores demonstrates that as temperature increases, concentrations of atmospheric __________. carbon dioxide and methane both decrease carbon dioxide decreases while methane increases carbon dioxide increases while methane decreases carbon dioxide and methane both increase Question 4 1 / 1 pts If the Earth's atmosphere did not contain greenhouse gases, the Earth's surface would be __________. approximately 33°C cooler approximately 10°C warmer approximately 10°C cooler approximately 33°C warmer Question 5 1 / 1 pts The Milankovitch cycles are dependent on the Earth's ________. orbital eccentricity precession angle of tilt on the rotation axis all of the above Question 6 1 / 1 pts Which of the following terms describes an accumulation of rocky, sandy, or clayey material deposited at the end of a glacier? dune esker loess moraine Question 7 1 / 1 pts The main force that drives glacial flow is ___________. tides wind gravity all of the above Question 8 1 / 1 pts Which of the following is a depositional feature rather than an erosional feature? an arete a cirque an esker a hanging valley Question 9 1 / 1 pts Which of the following features can be used to determine the direction a continental glacier moved? drumlins roches moutonées striations all of the above Question 10 1 / 1 pts A glacier is receding if __________. the amount of accumulation exceeds the amount of ablation the amount of ablation exceeds the amount of accumulation the amount of calving exceeds the amount of sublimation the amount of sublimation exceeds the amount of ablation Question 11 1 / 1 pts Which of the following best explains why the Great Basin and Mojave deserts of western North America exist? The two deserts lie in the rain shadow of coastal mountains The two deserts lie in the trade winds The two deserts lie near the equator The two deserts lie thousands of kilometers from the ocean Question 12 1 / 1 pts What term is used to indicate a geologic process powered by wind? Eolian Fluvial Lacustrine Barometric Question 13 1 / 1 pts Which of the following is not a cause of desertification? cattle grazing climate change irrigation latitude changes caused by plate tectonics Question 14 1 / 1 pts From what direction do the trade winds in the tropics blow? East North South West Question 15 1 / 1 pts In the temperate zones of the Earth between 30° and 60° latitude, the prevailing winds come from the ______. East North South West Question 16 1 / 1 pts Most of the world's deserts occur in the ________. regions around the North and South Pole regions where the westerlies blow regions north and south of the equator, known as the tropics regions of elevation above 10,000 meters Question 17 1 / 1 pts Which of the following best explains why the Sahara desert of Africa exists? The Sahara desert lies in the rain shadow of coastal mountains The Sahara desert lies near 30°N latitude The Sahara desert lies thousands of kilometers from the ocean The sandy soil of the Sahara desert drains so quickly that vegetation is unable to grow Question 18 1 / 1 pts What minerals are responsible for the orange-brown colors of weathered surfaces in the desert? carbonates framework silicates iron oxides sulfates Question 19 1 / 1 pts Desert varnish is composed of all of the following except __________. carbonate minerals clay minerals iron oxides manganese oxides Question 20 1 / 1 pts The steeper, downwind side of a sand dune is called a sand drift ventifact slip face none of these