Question 1
Which one of the following applies to a valley glacier that lengthens (extends the position of its terminus downslope over a period of many years?
◦ accumulation exceeds wastage
◦ accumulation and wastage are about equal
◦ wastage exceeds accumulation
◦ none of the above
Question 2
Crevasses (deep fractures or cracks) form in glaciers because ________.
◦ there is not always the same amount of ice available in all areas so cracks form when the ice tries to move and fill in empty parts of the glacier
◦ not all of the ice in a glacier moves downhill at the same rate in the glacier
◦ as the glacier moves over irregular topography, cracks can form anywhere in the glacier but they are called "crevasses" only if they are near the surface
◦ as the glacier moves over irregular topography the bottom of the glacier (known as the zone of fracture) cracks and the cracks propagate upward to the surface of the glacier
◦ as the glacier moves over irregular topography, the brittle upper layer or zone of fracture is subject to tension and cracks above the ductile layer
Examples of variation in leaf form.
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Glaciers in Retreat
Physical Fitness Profile Form.