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During which geologic time were dinosaurs the most dominant land organism?

Which statement is true about Crustal Rebound?

For isotopic dating, if a mineral contains 50% parent isotope and 50% if daughter isotope, how many half-life or (half-lives) has (have) passed?

Regional metamorphism takes place over a wide areas and the dominant factor is 

What combination of silica content and dissolved gases in lava will result in very violent eruption?

Large clouds of interstellar gas and dust are known as:

________________ explains why certain types of minerals tend to found together in igneous rocks while others are almost never associated with one another.

Doppler Effect

What factors contributed to the rise of slavery in the American colonies?

How could the Articles of Confederation be amended?