The leading cause for migration to the United States and Canada has been

A) freedom from religious persecution.
B) avoiding harsh environmental conditions.
C) forced migration.
D) economic opportunity.
E) fleeing dictatorial governments.


Answer: D

Environmental & Atmospheric Sciences

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The dark igneous features shown in this photograph are



A) dikes.
B) sills.
C) volcanic necks.
D) batholiths.

Environmental & Atmospheric Sciences

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

A) Absorption of light shows wave behavior while bending of light shows particle behavior. B) Absorption of light shows particle behavior while bending of light shows wave behavior. C) Both absorption and bending of light show particle behavior. D) Both absorption and bending of light show wave behavior.

Environmental & Atmospheric Sciences

Does the "Ring of Fire" include any part of the United States? Where?

What will be an ideal response?

Environmental & Atmospheric Sciences

  In the diagram, which layer has the most mixing of air?

A. I B. II C. III D. IV E. The most mixing of air is found in the border between II and III

Environmental & Atmospheric Sciences