The geographic location of the magnetic North Pole has varied over geologic time.
Answer the following statement true (T) or false (F)
True
Magnetite-rich rocks record the orientation of the magnetic field at the time the rocks form. These data were used to make maps showing the location of the magnetic North Pole at different times in the geologic past. The variable geographic location of the magnetic North Pole is referred to as polar wandering.
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In the year 2006, the U.S. consumed approximately one billion tons of coal. Each ton of coal produces 20 GJ (gigajoules of energy). How much energy was actually put to work?
A. 16% B. 59% C. 84% D. 29%
The link between plate tectonics and formation of mineral deposits has made the search for new ores more efficient.
Answer the following statement true (T) or false (F)
What kind of pollution source is a golf course that produces runoff with high nitrogen concentrations?
What will be an ideal response?
When waves approach a beach at an oblique angle, resulting in a lateral movement of water along the shoreline a ________ may develop.
A. sand dune B. long shore current C. groin D. delta