A natural, meandering, river channel is modified into a more or less straight and smooth, canal-like channel. Which of the follo
wing statements is correct? A. The straight channel has a higher gradient and more friction than the natural channel.
B. The natural channel had a lower gradient and higher friction than the straight channel.
C. The natural channel had a lower gradient and less friction than the modified channel.
D. All of the above statements are true.
False, igneous rocks may classified by chemical composition but may not be crystallized together in the same rock. SO there are always different minerals in igneous rocks.
