The diffusion of HIV/AIDS prevention methods and treatments in the United States is an example of which type of diffusion?

A) contagious
B) hierarchical
C) relocation
D) stimulus
E) geospatial


Answer: A

Environmental & Atmospheric Sciences

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All barriers have lagoons

Indicate whether the statement is true or false

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Describe and discuss the formation of the Proterozoic Banded Iron Formations (BIFs). What are they composed of?

Why are these BIFs economically important? What will be an ideal response?

Environmental & Atmospheric Sciences

Distinguish between chemical and mechanical weathering

What will be an ideal response?

Environmental & Atmospheric Sciences

The use of nuclear power throughout the world is generally

A) uneven, ranging from 0 to 74%, depending on the country. B) uneven, ranging from 3 to 22% in different countries around the world. C) consistent, with most developed countries generating most of the electricity with nuclear power. D) steadily declining, with most countries planning on phasing out their nuclear plants.

Environmental & Atmospheric Sciences