Convection occurs when heat rises which changes the density of a fluid or semisolid substance. Indicate whether the statement is true or false
ANS: T
The convection that occurs within the Earth begins in the asthenosphere and mantle. The heat rises as
it makes the liquid or semisolid around it less dense. The less dense portion then rises to the surface.
Information can be found in the section A New Understanding of Earth Evolved Slowly.
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The world today produces ________ pounds of food per person per day
A) 1.2 B) 2.7 C) 4.3 D) 5.6
Although acid precipitation has been reduced over the past two decades, progress has been slowed by
A) U.S. Supreme Court rulings that are very favorable to the energy industry. B) the increased use of gasoline that contains high levels of sulfur dioxide. C) the continuing and increasing impact of nitrogen deposition. D) the increased reliance on high sulfur coal by the power industries.
Residential areas are no longer important nor relevant in metroburbia
Indicate whether this statement is true or false.
Incineration is the primary means of waste disposal used today in the U.S.
Answer the following statement true (T) or false (F)