Role of vegetation in mechanical weathering

Mechanical weathering occurs when roots grow and cause the rock to break (just like the roots that crack the sidewalk). Chemical weathering occurs when roots release chemicals, like acid, which then break down the rocks. Plants can cause both mechanical and chemical weathering.

that’s true, tatiana prouskouriakoff established that the inscriptions were primarily historical.   they recorded events in the lives of mayan rulers and their families.

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his