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The primary stream fed by tributaries within a dendritic drainage network is termed a ________ stream.

In ancient Greece, Eratosthenes measured the difference in angles of the Sun’s rays in two different locations in Egypt at the same time to calculate the ________.

In the heliocentric model ________.

Wegener’s idea of continental drift was rejected by American geologists because ________.

By far the most common elements in the Universe and in our Solar System are ________.

A “bird’s foot” delta configuration, similar to that of the Mississippi River delta, forms when the ________.

The majority of caves are formed by the dissolution of bedrock ________.

How are carbon dioxide (CO2) levels in the atmosphere affected by tectonic uplift of rocks and their resultant chemical weathering?

The geotherm is the rate of change of ________.

The mineral class that makes up >95% of the continental crust is termed the ________.