Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Earth and Space Weathering and erosion
Transcript of Earth and Space Weathering and erosion
Weathering and Erosion
Erosion-removing earth material from their original site through transport
Weathering_The process at or near the Earth's
surface that cause rocks and minerals to break down
1. Mechanical-process that breaks a rock or mineral into smaller pieces without altering its composition (physical weathering)
2. Chemical Weathering-process that changes the chemical composition of rocks and minerals
2 types of weathering
thermal expansion and contraction
abrasion (wind and water)
plants and animals
Mechanical weathering agents
caused by expansion and contraction
causes layers of the rock to "peel away" from the surface
plants and animal waste
Factors in chemical weathering
regolith-small rock and mineral fragments (located at the bottom of the soil layer
Soil-organic matter mixed with weathered product
Weathering produces regolith
As soil forms it develops separate layers called horizons.
Each horizon is different. A cross section
of the soil horizon is called a profile
The uppermost layer is the "A" horizon.
the 'A' horizon is dark colored and bacteria can be found here.
Mature soil-soil that has developed 3 layers
-it takes thousands of years for soil to develop
topsoil-humus and other organic materials
soil layers that are recently formed
immature because there hasn't been enough time for all three layers to form. Soil in the northern regions where glaciation occurs is usually immature
water soaks int he ground and brings in minerals from the A layer and adds to the 2nd layer. This is leaching. The B horizon sits below the A horizon and is made of clay and some hummus.
This is subsoil-it is formed slowly
The C horizon is the third layer of soil. It is partially weathered rock. It is similar to the parent material. Below this layer you find the regolith