The air you breathe into your lungs on a daily basis mostly consists of
A) oxygen.
B) carbon dioxide.
C) nitrogen.
D) hydrogen.
C
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Both the gross domestic product (GDP) and genuine progress indicator (GPI) can be used as a measure of the wealth of a nation. Explain the difference between the GDP and GPI
What will be an ideal response?
How has glacial ice aided the study of climate change?
A) Glacial ice contains trapped air bubbles that archive former atmospheric carbon dioxide concentrations. B) Glacial ice only exists where temperatures are exceedingly cold. C) Glacial ice flows only under its own weight, so studies of glacial ice reflect climatic conditions. D) Glacial ice stores water that would otherwise enter the oceans and cause sea level rise.
Beaches with very fine-grained sediments tend to be ____
A) relatively steep B) relatively flat C) most common along erosional coastlines D) in areas where the coast is rapidly rising or sinking
An imaginary surface extending beneath the continents which limits how deep streams may cut is _______.
a - grade b - a trellis c - traction d - a knickpoint e - base level