What characteristic of rivers at their source gives them so much power to shape the land

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?