The red color of Navajo sand stone is primarily because of the presence of what element? Yesterday's question was "How many times does the Moon appear as half-full during a single lunar cycle?" The answer was 2.
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How many times does the Moon appear as half-full during a single lunar cycle? Yesterday's question was "The spines of cacti are a modification of what plant structure?" The answer was leaves.
The spines of cacti are a modification of what plant structure? Yesterday's question was "An automobile traveling at 100 kilometers per hour has how many more times the kinetic energy than the same vehicle traveling at 50 kilometers per hour?' The answer was 4 times.
An automobile traveling at 100 kilometers per hour has how many more times the kinetic energy than the same vehicle traveling at 50 kilometers per hour? Friday's question was "Name the most common disaccharide, known as milk sugar, that is found in milk?" The answer was lactose
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