Which of the following is an example of an interval variable. A. The number of earthquakes that occurred last year that affected California. B. The high temperature yesterday in Columbia (measured in degrees Fahrenheit). C. The amount of rain (in inches) that fell last night in Columbia. D. The number of days last year the Columbia Public Schools were closed due to inclimate weather. E. None of the above.

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

Based on what you know about speed of light and sound, which come/comes first in a thunderstorm