ShareRocks & Minerals - Gravity, An Agent of Erosion
Gravity is an agent of erosion. Rocks break apart only when a force makes them do so. Gravity is one force that helps break down rocks to smaller pieces. This never ending force works 24 hours a day, 7 days a week, 365 days a year. It has done so for millions and millions of years.
Water running down all the mountains and valleys is pulled down by this force of gravity. Wind is ultimately a result of air molecules being held to Earth's surface due to gravity. Water, wind, and ice working under the influence of gravity are the greatest sources of erosion on the surface of Earth. The effects of gravity combined with wind, water and ice create many types of geologic features. Many of these geologic features are so unique and beautiful that they have been given status as State or National Parks. Look closely at some examples of erosion:
Analysis:
- In what ways are the erosion of all four photographs similar?
- Can only one form of erosion be responsible for any of the above photographs?
- How many of the forms of erosion would you say are responsible for each of the photographs above?
- How many of these areas do you recognize as places you have visited
here in Utah?
- Utah is home to various locations that show great evidence of the influence of gravity on erosion. Look for your own examples as you travel this great state.
