You and your friends have found two different creeks to swim in. the first is crystal clear and cold. the second is slightly cloudy, but much warmer. what makes the two creeks different?

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

The first mathematical theory of tides was introduced by: galileo kepler newton cousteau