Which river is the longest in the world? a. nile b. amazon c. yellow d. yangtze i think its a or b

How do oceanographers measure the salinity of ocean water?

In wegener’s evidence for continental drift, continents were proposed to fit together, such as the east coast of south america with the west coast of europe. east coast of africa. west coast of greenland. lower west coast of africa.

Why is terracing used in southeast asian agriculture?