Karst Lesson - WeatheringThis is a featured page

Karst Observation Activity:

The Weathering Process at the Eramosa Karst Conservation Area

Name:____________________ Date _______________________

Lesson Focus
Weathering Process -The term weathering refers to the destructive processes that change the character of rock at or near the Earth's surface. Types of weathering:

  1. Mechanical - Processes of mechanical weathering (or physical disintegration) break up rock into smaller pieces but do not change the chemical composition. The most common mechanical weathering processes are frost action and abrasion.
  2. Chemical. The processes of chemical weathering (or rock decomposition) transform rocks and minerals exposed to water and atmospheric gases into new chemical compounds (different rocks and minerals), some of which can be dissolved away.
  3. Physical removal of weathered rock by water, ice, or wind is called erosion.
We often think of weathering as destructive and a bad thing because it ruins buildings and statues. However, as rock is destroyed, valuable products are created. The major component of soil is weathered rock. The growth of plants and the production of food are dependent on weathering.

To Understand the Weathering process
See "Do Rocks Last Forever"

Preparation - when visiting the Eramoas Karst take along
- Karst Map
- Clipboard
- Pen or pencil
- Camera
- Watch

TASK: Take pictures, or make a sketch with notes of the Rocks, Soil, Water, Plants and any birds or wildlife observed that show the weathering process and effects.

Further Questions for discussion/ reflection

1. What did you learn about the weathering process?
2. What different types rock and soil did you see?
3. How does water affect the weathering process?
4. If you visited the Karst at a different time of year: Spring, summer, winter, fall what do you think would be different?

Site Location Photo/ or Sketch Evidence of Weathering- notes
















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Word Document karst lesson- weathering process.doc (Word Document - 40k)
posted by MsPage   Apr 17 2009, 1:05 PM EDT
Karst Lesson Handout -Weathering process