How do we know that most of the heat leaving Earth's interior is coming from below the crust?
What will be an ideal response?
If the heat leaving Earth was coming from the crust, we should see higher heat flow values on continental crust than oceanic crust because the continental crust is thicker and it contains more radioactive elements. This is the opposite of what is actually occurring.
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Why are buffer zones important components of megareserves?
What will be an ideal response?
List five things that you do that can contribute to the loss of the world's wild species?
What will be an ideal response?
How could you use seismic-wave travel velocities to determine if magma is present below a restless volcano?
What will be an ideal response?
The Dust Bowl in the United States in the 1930s was caused primarily by
A) planting grains in soils that could support only leaf crops sustainably. B) lack of any soil conservation practices, continuous cropping, coupled with natural drought. C) lack of enforcement of the soil conservation provisions of the 1862 Homestead Act. D) attempts to farm areas with desert-like climate and thin topsoil.