As far back as 1620, Sir Francis Bacon commented on the similarity of the shorelines of western ____________________ and eastern ____________________
Fill in the blank(s) with correct word
Africa, South America
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Express a fractional scale of 1:100,000 as a verbal scale: One centimeter represents _____ kilometer(s).
What will be an ideal response?
Lead enters the atmosphere as a particulate pollutant. This is a problem because it ________
A) is a precious metal, and it is being lost to the atmosphere B) provides excess nutrients to waterways, resulting in eutrophication C) will cause the ozone hole to increase D) can become attached to radon E) causes central nervous system damage in humans
What is the largest single trade bloc in the world today?
A) North American Free Trade Agreement B) European Union C) Association of Southeast Asian Nations D) Latin American Free Trade Agreement E) Organization of Petroleum Exporting Countries
In 1962, Rachel Carson published Silent Spring, which dramatized the potential dangers of ________ to food, wildlife, and humans and eventually led to changes in the United States on their use.
Fill in the blank(s) with the appropriate word(s).