crct question
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CRCT Question. What type of erosion best describes why the Dust Bowl in the 1930’s occurred? Wind erosion Landslide erosion Water erosion Wave erosion. Soil Lab. TOMORROW Bring your appetite . Final Study Guide . What parts are due? When are they due?. Candy Toss . - PowerPoint PPT PresentationTRANSCRIPT
CRCT QuestionWhat type of erosion best describes
why the Dust Bowl in the 1930’s occurred?
a. Wind erosionb. Landslide erosionc. Water erosiond. Wave erosion
Soil LabTOMORROW
Bring your appetite
What parts are
due?
When are they due?
Final Study Guide
Candy Toss
What is soil MOSTLY
made up of?
What are the
horizontal layers in the soil called?
dark, organic material formed in soil from the
decayed remains of plants and animals is called what?
Which type of rock is made by stratification
Review
What type of rock can
form into a sedimentary rock
during the rock cycle?
Review
About how old is the
Earth?
Review
Soil Conservation
How did it all start?!?! http://app.discoveryeducation.com/player/view/assetGuid/BB8594C5-87EA-445D-A672-C311AAAA44BA
Everything that lives on land depends on soil.
We have a limited supply of fertile soil.
We must conserve and protect our soil.
What are some ways you can think of to protect this resource?
Soil Conservation
Soil conservation – is the method to maintain the fertility of the soil by protecting the soil from erosion and nutrient loss
The importance of soil – soil provides minerals and other nutrients for plants and all animals get their energy from plants Housing – soil provides a place for
animals to live Water Storage – without soil to hold
water, plants would not get the moisture of the nutrients they need. Soil also keeps water from running off
Soil Damage and Loss – can
be caused by overuse, poor farming techniques or overgrazing Soil Erosion – the process by
which wind, water, ice, or gravity transport soil and sediment from one location to another
In the 1930’s, farmers removed all the grasses holding the soil in place. After a drought, the wind blew all the topsoil away. Millions of people were affected. This event was called the “Dust Bowl.”
http://earthobservatory.nasa.gov
Contour Plowing and Terracing
Contour Plowing – plowing across the slope of hills
Terracing – changing one steep field into a series of smaller flatter fields
Why was this hillside shaped like this for farming?
http://www.acca21.org.cn/nrp3-12.html
These are terraces – walls built to prevent erosion by making flat places for farming.
These trees are used as a wind break to stop erosion by wind.
Cover Crop and Crop Rotation
Cover crops – crops that are planted between harvest to replace certain nutrients and prevent erosion
Crop rotation – planting different crops
Contour plowing – following the shape of the land to prevent water erosion.
ReviewWhy is soil important?
What is the difference between a wind breakand terracing?
What was the Dust Bowl?
Project
Part 1 I will meet with you
and discuss some suggestions
Checkpoint out of 5, did you complete everything?!
You can work on your final
Part 2 SOIL
Start your rough draft!!!!