A mirage is an optical effect caused by refraction when light passes from air with one density into air with a different density, causing the object to appear displaced from its true position
Indicate whether the statement is true or false
TRUE
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According to Stephen Saunders, former deputy assistant Secretary of the Interior, the greatest threat the national parks have ever had is
a. large scale deforestation b. the projected climate change c. overuse by tourists d. air pollution e. pollution of both air and fresh water bodies such as streams and rivers
Tertiary-sector employment is increasing in poor countries where
A) most people are subsistence farmers. B) most people are hunter-gatherers. C) the tertiary sector is well integrated into the world economy. D) there is an abundance of raw materials. Answer: C
True or False: Coal is one of the leading energy providers in the United States
Indicate whether this statement is true or false.
Name the order of currents that would take a molecule of water from off the coast of equatorial Africa along the coast of North America and then back to its starting point
What will be an ideal response?