As a review, explain briefly how the following agents cause weathering of rocks :
1. Water - Watercanbreakrocksintodifferentways.Thestrongwaveshittingtherockscanmakeitbreak.
2. Temperature - Whenrocksareexposedtovaryingtemperature,itexpands.Ifrocksareexposedtoalowtemperature,itcontracts.Therepeatedexpansionandcontractionofrocksduetochangesintemperatureresultsinweathering.
3. Plants and Animals - Someplants,likelichens,fernsandmosses,canalsotriggerweathering.Itcangrowonrocksandcauseittobreakintopieces.Treescanalsotriggerweathering.Itsgrowingrootscanbreakthecementedground.
Answers & Comments
SCIENCE
PROCEDURES
A. Reviewing previous lesson
As a review, explain briefly how the following agents cause weathering of rocks :
1. Water - Water can break rocks into different ways. The strong waves hitting the rocks can make it break.
2. Temperature - When rocks are exposed to varying temperature, it expands. If rocks are exposed to a low temperature, it contracts. The repeated expansion and contraction of rocks due to changes in temperature results in weathering.
3. Plants and Animals - Some plants, like lichens, ferns and mosses, can also trigger weathering. It can grow on rocks and cause it to break into pieces. Trees can also trigger weathering. Its growing roots can break the cemented ground.
Animals that live underground also contribute to weathering. As burrowing animals dig deeper such as rabbit, they cause rocks break into pieces.
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