A catastrophic earthquake is one with a magnitude over 9.0. It has strong effects over areas thousands of miles in diameter. Catastrophic earthquakes are recorded about once every
A. 20 years.
B. month.
C. 500 years.
D. 2 years.
Answer: A
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A) X-rays, because they let us see into Earth. B) radio waves, because they are of similar length. C) sound waves, because they are longitudinal. D) ocean waves, because they are transverse.
Zooplankton are plants that live attached to the ocean bottom. Indicate whether the statement is true or false
Five countries/areas have the lowest fertility rates in the world. What are they?
A) Armenia, Azerbaijan, Estonia, Kazakhstan, Uzbekistan (all in former Soviet Union) B) Egypt, Jordan, Saudi Arabia, Syria (all are part of the Muslim world) C) Macau, Hong Kong, Singapore, Taiwan, Japan (all are in Asia) D) Morocco, Algeria, Gibraltar, Malta, Cyprus (all have a border on the Mediterranean Sea) E) Nicaragua, El Salvador, Guatemala, Costa Rica, Panama (all are in Central America)
A seasonal north wind blowing along the west coast of a landmass in the Northern Hemisphere produces ________.
A. downwelling in summer B. upwelling in winter C. overturn in all seasons D. upwelling in summer E. downwelling in winter