How does a glacier move and where does the movement take place? How quickly do glaciers move?
What will be an ideal response?
Ice flows under its own weight with slippage along weak planes within ice crystals and also slippage along the base of the glacier where it rests on rock or regolith, if the glacier is not frozen to its base. This means that the glacier moves both by sliding at the base and flow within the glacier itself. Measured rates of glacier motion are mostly between 2 m and 8 km per year, with the fastest glaciers exhibiting most of their motion by sliding at the base.
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Many invasions from the northwest came to South Asia through the _________ Pass.
Fill in the blank(s) with the appropriate word(s).
Charge separation in clouds
A) requires collisions between ice particles and either snowflakes or graupel. B) is part of the collision-coalescence precipitation-formation process. C) is caused by the voltage difference between the ground and the tropopause. D) is most common in altocumulus clouds. E) is usually horizontal, not vertical.
The dispersion of pollutant material into the atmosphere depends on the wind and the ________ of the air layer
A) depth B) stability C) temperature D) visibility E) pressure
Which of the following correctly matches the tectonic setting of a mountain belt with an example?
A. continental collision-Andes Mountains B. subduction zone-East Africa C. mantle upwelling-Tibet D. All of these. E. None of these.