Water pressure becomes an important factor in increasing landslide danger when ____
a. ?slope surfaces become saturated
b. ?pressure increases with depth
c. ?pore spaces are filled with water
d. ?the water has significant clay content
e. ?the slope is composed of clays
ANSWER: c
You might also like to view...
After reviewing Figures 25.1 and 25.2, answer the following questions about Figure 25.5:
Figure 25.4 shows a contour map of a hypothetical landscape that has been shaped by alpine glaciation. As glaciers carved their way down preexisting V-shaped stream valleys, they widened the valleys into U-shaped valleys separated by sharp ridges. Hanging valleys/troughs left stranded above the main valley floor will be occupied by streams that form picturesque waterfalls as they plunge over the steep edge. Glaciers may scour out the bedrock of the valley floor, leaving depressions that, as the glacier retreats and a stream reoccupies the valley, subsequently fill with water, forming glacial lakes called tarns. Steep-walled cirques mark the origin of the glaciers high on the mountain slope. Keep this contours map, along with the Mount Darwin topo map and aerial imagery, in mind when analyzing the topographic map of Mount Rainier. a) If you wanted to go swimming in a tarn, which letters would you look for? b) If you were a rock climber and wanted to scale the steep sides of the valley, which letters would you look for? c) Which letters indicate the location of a pass on the ridge between two valleys? d) If you wanted to climb the horn created by three glaciers, which letter would you look for? e) What is the elevation of the peak?
Gradient flow:
A) undergoes constant acceleration. B) is a geostrophic wind. C) occurs when wind flows parallel to the pressure gradient. D) maintains the same direction.
Divergence in the upper-level jet stream hinders the formation of severe thunderstorms
Indicate whether the statement is true or false
Hurricanes are called major hurricanes if ________.
A. last more than 4 days B. are classified as category 3 or above on the Saffir-Simpson Scale C. they have air pressures greater than 980 millibars D. the wind speeds are at least 120 km/hr E. they make landfall at high tide