A region of the United States with a high concentration of karst lakes is located in ____
a. Hawaii
b. Nevada
c. Florida
d. North Dakota
c
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What is the particular significance of valence electrons?
a. Unlike electrons in other shells, valence electrons have no charge. b. Valence electrons always balance the charge produced within the nucleus. c. The number of valence electrons is the atomic number for that element. d. Valence electrons form chemical bonds between atoms by being transferred or shared. e. The number of valence electrons defines the type of element.
A comet may travel 100,000 astronomical units away during its orbit (an astronomical unit is the distance between Earth and Sun).
Answer the following statement true (T) or false (F)
A giant sea swell known as a tsunami is caused by
A. A strong wave during an exceptionally high tide B. Lunar gravity C. Unusual tides combined with seasonal storms D. Earthquakes E. Typhoons
An effective way to measure soil erosion in a region is to measure the
A. Sediment load of rivers B. Distance the dust travels C. Amount lost on crop fields D. All of these are effective ways to measure the loss E. Amount of dust in the air