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If the signal D was the sum of two sinusoidal signals (red and blue), what would be the primary perceptual pitch of the D?

Which of the following is the most widely accepted hypothesis to explain the formation of desert pavement?

Material deposited in a long ridge extending out from a coast and partially blocking the mouth of a bay is called a

The removal and lifting of individual loose particles by the wind is termed

The cones of the Table Mountain pine only open when exposed to intense heat. This is an example of

The class of landforms formed by the accumulation of glacial till are known as

In the mid-1800s Charles Darwin introduced the theory of _________ to explain how a new species could evolve from an earlier species with different characteristics.

Tides are produced by __________.

The zone of seasonally frozen ground that exists between the subsurface permafrost layer and the ground surface is called the

________ occur when high winds and water during tropical storms push sea water above the expected tideline.