The process that continues to move Africa and South America apart from each other is
____________________. Fill in the blank(s) with the appropriate word(s).
seafloor spreading
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How does carbon enter the atmosphere? What effect does it have on Earth? How does it cycle back for
use in biological components? What will be an ideal response?
A "greenhouse gas" that is currently thought to be a significant cause of recent global warming is ____
a. nitrogen dioxide b. hydrogen peroxide c. ferrous oxide d. carbon dioxide e. hydrogen sulfide
During a total lunar eclipse, the moon remains visible because ________
A) the atmosphere of the earth refracts light around its perimeter B) the atmosphere of the moon diffuses light from the other side of the moon C) the earth is too far from the moon to totally cover the solar disk D) None of the above; the moon completely disappears against the night sky.
Rocks are aggregates of minerals
Indicate whether the statement is true or false