What might be present to cause a reddish color in a soil horizon?
A) organic materials
B) bedrock
C) aluminum and iron oxides
D) clay minerals
Answer: C
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Cloud seeding using silver iodide only works in?
a. ?cold clouds composed entirely of ice crystals. b. ?warm clouds composed entirely of water droplets. c. ?cold clouds with a low ratio of ice crystals to water droplets. d. ?clouds with more ice crystals than supercooled droplets. e. ?clouds that can produce precipitation.
There is an ongoing dispute among Congress, the oil industry, environmentalists, and indigenous peoples about whether the oil reserves of northeastern Alaska's Arctic National Wildlife Refuge (ANWR) should be exploited. What are the arguments for and against developing this region?
Warming and cooling of air creates density oscillations known as ____________________ that show up as small pressure changes near Earth’s surface
Fill in the blank with correct word.
The ecliptic and zodiac are different names for the same thing
Indicate whether the statement is true or false