All questions are multiple choice, with only ONE correct answer.
If you are confused about the meaning of a question or answer option, please ask me. You've heard this one in class and probably seen one just like it on a previous quiz. I throw a ball upward and, after a few seconds, it falls back to the ground. Suppose the earth's size were to triple, leaving its mass unchanged. D. earth's orbital speed would immediately increase, making our days much shorter E. earth would immediately begin a slow spiral into the sun.