On March 22, the United States Geological Survey (USGS) reported that a 2.3 magnitude earthquake occurred in southern Illinois. How many detectable earthquakes does the USGS estimate occur in the world each year?
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On March 22, the United States Geological Survey (USGS) reported that a 2.3 magnitude earthquake occurred in southern Illinois. How many detectable earthquakes does the USGS estimate occur in the world each year?
1.) 5,000, 2.) 50,000, 3.) 500,000 4.) 5 million 5.) 50 million
The answer to last week’s quiz is: The Hula Hoop was first marketed in 1958, and an estimated 25 million were sold in its first four months of production. Although the enormous popularity of the Hula Hoop was short-lived, the toy still has fans today.
