C165 Refresh Exam Questions With All Correct Detailed Answers

C165 Refresh Exam Questions With All Correct Detailed Answers Continental to Continental plate features - Answers - Convergent plate boundary. No subduction occurs, instead crust is forced upward, forming mountains. Large earthquakes are common, volcanoes are uncommon. Subduction - Answers - the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. Convergent Plate Boundaries - Answers - Oceanic/Continental, Oceanic/Oceanic, Continental/Continental. Plates are pushed together at a convergent boundary. Oceanic/Continental plate boundary features - Answers - Convergent plate boundary. Ocean plates sink under the continent into the mantle, known as subduction. Water is squeezed out of the crust, mixing with hot mantle rock. Magma rises up, forming mountain chains. Oceanic to Oceanic plate features - Answers - Convergent plate boundary. One plate subducts, deep ocean trenches & volcanic crust forms. Large earthquakes are common. Volcanic islands are formed rather than volcanic mountains. Divergent plate boundaries - Answers - Oceanic & Continental. Plates pull apart along a divergent boundary. Oceanic plate boundary - Answers - Divergent boundary. Most divergent boundaries are at the ocean floor. Magma rises to fill the gaps, forming a mid-ocean ridge (submarine volcano). Thus new ocean crust forms and the plates grow at divergent ocean-ocean boundaries. Continental plate boundary - Answers - Least common Divergent boundary. Rift valleys in Africa and large volcanic mountains such as Kilimanjaro are the result of divergent boundaries within a continent. As the plates diverge, the continental crust thins so much that mantle rocks are extremely close to the surface. The mantle rocks melt and erupt to form new oceanic crust. Eventually, the low valley fills with ocean water and a new ocean forms. Thus a continental rift becomes a seafloor spreading zone. Transform Boundaries - Answers - Plates slide past one another at a transform boundary. Most transform boundaries occur under oceans, but some occur within the continental crust. Earthquakes are likely, however there is no subduction or spreading, so volcanoes are uncommon. Five layers of Earths atmosphere - Answers - troposphere, stratosphere, mesosphere, thermosphere, and exosphere Properties of the Troposphere - Answers - First layer. Troposphere extends 8 km (at the poles) to 16 km (at the equator). densest layer contains about 75% to 80% of the mass of the atmosphere. Air is in a constant motion in the troposphere. It is in this layer that weather occurs. temperature decreases with altitude in the troposphere. Properties of the Stratosphere - Answers - Second layer, extends 8-16km to ~50km. Contains the Ozone layer, very stable, airplanes fly here. Properties of the Mesosphere - Answers - Third layer. Extends past Stratosphere to 85km. Meteors burn up, causing shooting stars or meteor showers here. Properties of the Thermosphere - Answers - Fourth layer, stretches from 85km-5/600km. Polar/aurora lights, orbital layer containing the ISS. Properties of the Exosphere - Answers - 5th/Final layer, 5-600km+ Atmosphere merges with outer space. No exact end, generally taken a vacuum exists at 1300km+. Effects of warmth on air pressure - Answers - Air pressure decreases with temperature and humidity, so a warm, moist air mass will have a lower pressure than a cold, dry air mass. Effects on wind patters on air pressure - Answers - Wind can move air molecules together (convergence) or apart (divergence) Air pressure increases with convergence, and decreases with divergence.