Key Knowledge

Vocabulary

weathering - process of wearing away rocks by natural processes

erosion - process of wearing away and removing sediment by wind, water, or ice

landform - a natural land shape or feature

topography - all the kinds of landforms in a certain area

sand dune - sand hill that is made and shaped by wind

sinkhole - large hole caused by the collapse of the roof of a cave

Key Concepts

Weathering is the loosening of a particle of rocks. Once that particle starts moving, it is considered erosion.

The movement of wind or water is a common cause of weathering and erosion.

Changes in the earth's surface can be caused by physical changes (abrasion of sand on rocks breaking off pieces of rock) as well as chemical changes (reaction of water with limestone changing the structure of limestone molecules).

 

Basic procedure
Key Knowledge
Science Background
Script Idea
Barrier Islands
Alternate Ideas
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