Streamlined eolian erosional landforms that taper in the downwind direction ____
a. have slip faces
b. lie at the angle of repose
c. are yardangs
d. are drumlins
c
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The most common gas in the atmosphere is
A) oxygen (O2). B) carbon dioxide (CO2). C) nitrogen (N2). D) methane (CH4).
In the mid-1900s the main sources of immigrants were
A. Africa and the Middle East B. Australia and New Zealand C. Northern and Western Europe D. Asia and Latin America
To calculate the age of a rock, you need to know the parent-daughter isotope ratio and ________
A) the half-life of a radioactive isotope B) the composition of the parent rock C) the area in which the rock was deposited D) the sequence of depositional events
A graded stream is one that has achieved a dynamic equilibrium between degradation and aggradation
Indicate whether the statement is true or false