Weathering and Mass Movement
Unable to see a rock expanding due to the temperature fluctuation although it does happen. It weakens the rock causing it to eventually break down
The tendency for minerals to expand and contract based on rapid change of temperature.
The change of temperature cause stress and small cracks within the rocks which lead to the gradual breakdown of the rock
The breakdown of rock due to the expansion of ice
It happens in the crevices between rocks.
Day when temperatures are warm, water trickles into cracks and pores within rocks
Night: temperature drops , water freezes and expands, the cracks within the rocks widen and eventually shatter portions of the rock
As the roots grow in size, they widen the cracks. The roots often win the battle and push the rock, causing pieces of the rock to fall off.
Stationary rocks are scraped away by other loose rock and mineral fragments.
These fragments are carried away by the air or water and come in direct contact with the stationary rocks.
In deserts, abrasion occurs where sand is picked up and carried away by the wind. The sand acts like natural sandpaper, smoothing the surface layer of rocks.