In what region of Sub-Saharan Africa is desertification most severe?
A) the Kalahari
B) the Sahel
C) the Congo
D) the Horn of East Africa
E) South Africa
B) the Sahel
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What role do ocean currents play in the distribution of sea ice?
What will be an ideal response?
A solution of pH 5 has ________ times ________ hydrogen ions than a solution of pH 7
A) 20; more B) 20; fewer C) 100; fewer D) 100; more E) Cannot be determined from the information given
Which of the following is a good example of a biological agent or action that is a hazard to public health?
A) Rotavirus infections lead to deadly diarrhea in more than a million children each year. B) Chewing tobacco is known to greatly increase the chances of cancer of the mouth and throat. C) For people living deep in a forest, the drought increased the chances of a deadly forest fire. D) The use of air bags and safety belts has greatly reduced accidental deaths in moving vehicles.
Transportation is the picking up or physical removal of rock particles by an agent such as running water or glaciers.
Answer the following statement true (T) or false (F)