CRCT Question

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!!!!