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Technology Prezi: Teresa Meza/6th Grade/Science
Transcript of Technology Prezi: Teresa Meza/6th Grade/Science
Important concepts of chapter 11 and 12 SC.6.E.6.1 Describe and give examples of ways in which Earth's surface is built up and torn down by physical and chemical weathering, erosion, and deposition.
- Prosser & Trigwell, 1997 read it...Apply it! 3 4 6 7 17 18 19 20 21 WARNING WARNING... STUDENT DISCLAIMER FOLLOWS!!
In this Prezi you will be reviewing the important concepts from Chapter 11 on weathering and Chapter 12 pertaining to erosion and deposition. This presentation does not include all of the content that you will be tested on, so be sure to study both chapters thoroughly so you are fully prepared for the assessment. As we learned, tiny moss plants, earthworms, and even oxygen
in the air can effect solid rock. It is important to remember that
the surface process that works to break down rock is
known as the common process called weathering. Keep in mind that even the smallest change in surface compositions
weaken and breakdown rock. Who would have thought that such things, like
a tiny worm, could have such an impact on the earth around us!
Where have you seen pieces of rock
that could have been broken down by
weathering? As we read and also observed in the
lab, two very *important concepts*
to study are the components of
mechanical and chemical weathering. Mechanical and& Chemical
Weathering In More Detail! mechanical weathering: chemical weathering: Science/6th Grade/Teresa Meza SOIL EROSION Soil erodes when it is moved from the
place where it formed. Erosion occurs
as water flows over Earth's surface or
when wind picks up and transports
Under normal conditions, a balance between soil production and soil erosion often is maintained. Remember that this means:
soil forms at about the same rate as it erodes. Causes of soil erosion:
Preventing Soil Erosion:
* Manage crops
* REduce Erosion on Slopes
examples--contour farming and terracing
* Reduce erosion of exposed soil
Water Erosion Deposition water forms a number of systems. Streams, rivers,
and the ocean form surface systems, while groundwater
forms a separate system.
These systems interact with rocks and soil, producing
erosion and deposition.
water erosion is the combination of natural processes
that wears away surface materials and moves them
from one place to another. Types of water erosion:
*Rill and Gully erosion
Surface water erosion is:
--Rainwater that does not soak into the ground, but is pulled down the slope by gravity; this is runoff
--steepness of slope, number and type of plants effect surface water erosion
**be sure to look closer at how runoff affects the different water systems and the ages of streams and their distinguishing characteristics.
Groundwater = water that soaks into the ground
REMEMBER--- Some rocks have connected spaces called
pores. Rocks are can be either permeable or
impermeable and these factors influence groundwater. Definition of Deposition:
Dropping of sediments that occurs when an agent
of erosion loses its energy and can no longer
carry its load.
What are some examples of Deposition that
you can think of??
This occurs when
rocks are broken apart by physical processes.
This means that the overall chemical makeup
of the rock stays that same. Examples: growing
plants, burrowing animals, and expanding ice Occurs when chemical processes
dissolve or alter the minerals in rocks or change them
into different minerals. This type of weathering occurs
at or near the Earth's surface and changes the chemical
composition of the rock, which can weaken the rock. Now it's your turn! I strongly suggest that
you go back through the chapters and reveiw the material. Another great study tool is to assess your knowledge through the chapter reviews and section checks. Remember that you can never study too much!!