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Q1: Mars actually reverses its orbital direction to
Q17: During the process of _, soil loses
Q19: The principle of superposition assures us that
Q28: Isotopes with long half-lives give good ages
Q34: Which of these igneous rocks is the
Q35: Which of the following statements is not
Q49: If tectonic forces stretch the crust over
Q55: Imagine that you found two sandstone beds
Q58: _ is a condition in which water
Q59: Which of the following is not true