front 1 | back 1 basal sliding |
front 2 Which type of glacial movement will be responsible for the greatest amount of glacial flow? | back 2 internal flow |
front 3 Explain why post A has moved farther than posts B and C. | back 3 Ice in the center of a glacier has the least friction with the surrounding bedrock and can flow faster. |
front 4 Which part of a glacier will see the build-up of ice and snow over the course of a full year? | back 4 Zone of Accumulation |
front 5 How does a glacier lose ice through sublimation? | back 5 Ice changes from solid to gas. |
front 6 Which of the following budget scenarios describes a glacial advance? | back 6 More ice and snow accumulates than melts each year. |
front 7 During a glacial retreat, a glacier will flow _____ while the terminus moves _____. | back 7 forward; backward |
front 8 A __________ is defined as a chain of glacial lakes where each lake flows into the next. | back 8 pater noster lake |
front 9 | back 9 arête |
front 10 | back 10 horn |
front 11 What is the best way to describe the shape of a glacial valley? | back 11 U-shaped |
front 12 Which two regions currently contain the world's last remaining ice sheets? | back 12 Antarctica and Greenland |
front 13 When was the last time North America had major ice sheets? | back 13 18,000 years ago |
front 14 Which landform marks the furthest extent of an advancing glacier? | back 14 terminal moraine |
front 15 What glacial landform is visible in Figure 1? | back 15 drumlin |
front 16 What feature is responsible for creating eskers? | back 16 streams that flowed below, in, or on the glacier |
front 17 Which orbital effect describes how the shape of Earth's orbit around the Sun will change over time? | back 17 eccentricity |
front 18 What is the critical latitude for incoming solar radiation, which could affect the formation of ice sheets? | back 18 65° N |
front 19 How many years does one complete cycle of precession take? | back 19 26,000 years |
front 20 What effect will an increased angle of tilt have on the Earth's climate? | back 20 warmer summers and colder winters |
front 21 Which of the following scenarios will have the greatest chance of triggering an ice age? | back 21 eccentricity, obliquity, and precession overlapping to provide the least amount of solar radiation |