Most canyons were formed by a process of long-time erosion from a plateau or table-land level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls
4.shapes of leaves....……………
There are 1,000 milligrams in 1 gram, so...
Let's divide
300 milligrams = 0.3 grams
Now...
500 aspirins would have about the same mass as one baseball