Glacial valleys tend to have a "V" shape.
a. true
b. false
b. false
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The primary influence on variation in climate is
a. slope angle b. elevation and slope angle c. temperature and slope angle d. average annual precipitation and temperature e. humidity and elevation
Many large intertidal plants must be slippery in addition to being strong and elastic to avoid being
shredded by the intense wave energy of the intertidal. Indicate whether the statement is true or false.
Divisions in geologic time represent ____
A)the passage of 10 million years B)a mass extinction C)distinct changes in the rock record D)the onset of Ice Ages E)the passage of 20 million years
The Precambrian shield consists of ________.
A. very recent sediments B. flood basalts C. ancient metamorphic and plutonic rocks D. thick layers of sedimentary rocks