The Earth's magnetic field is generated by
A) salty water moving through the deep parts of the crust.
B) convection currents in the asthenosphere.
C) movement of iron and electrical currents within Earth's outer core.
D) aligned magnetic minerals within Earth's inner core.
C) movement of iron and electrical currents within Earth's outer core.
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Agricultural regions generally have a smaller average family size than that of their city counterparts.
a. true b. false
Explain how Darwin’s observations during his 5-year voyage on the Beagle led him to change
his mind about the fixity of species. What will be an ideal response?
What are the main sources of terrigenous sediments?
Catalysts serve to _________ the rate of chemical reactions by _________ the activation energy.
Fill in the blank(s) with the appropriate word(s).