6. Circle the letter of each sentence that is true about Earth. a. Indirect evidence of Earth's interior comes from studying ro
samples.
b. Geologists cannot observe Earth's interior directly.
c. It is over 6,000 kilometers from the surface to the center of
d. Geologists learn about Earth's interior by drilling holes.

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Concealer circle oh in which arc xy measures 16 pi centimeters the length of the radius of the circle is 32 cm what is the circumference of the circle

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