The Grand Canyon was formed over millions of years by erosion from water, wind, and ice. Which is another example of erosion?
A. water and acid dissolving minerals in rocks
B. roots wedging into and splitting rocks
C. glaciers scraping and moving large rocks
D. frozen water expanding and cracking rocks

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.