________ are long, linear scratch marks carved onto bedrock by glacial abrasion
A) Eskers
B) Glacial troughs
C) Glacial striations
D) Hanging valleys
Answer: C
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Why do we know very little about the planet's first 600 million years? Why do we know only slightly
more about the early part of the Precambrian? What will be an ideal response?
When a large number of runaway electrons accumulates in a small volume, the energy is released in a process called a
A) electron conveyer. B) positive discharge. C) runaway breakdown. D) volumetric discharge.
Streams generally receive their water from two sources. What are those two sources?
A) Lakes and meteorites B) Meteorites and comets C) Overland flow and groundwater D) Groundwater and evaporation
The length of twilight depends on ______
a. ?just the seasons b. ?just the latitude c. ?just the longitude d. ?season and latitude e. ?season and longitude