1 / 20

Study Hall

Study Hall. Sit in your assigned seats and work on something quietly at your desk…. Grab your notebook and a sharp pencil…. Warm up. Draw the rock cycle then tell me h ow soil forms?. Write in Notebook. How much of Earth's crust contains usable soil?. Follow along ….

Download Presentation

Study Hall

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Study Hall Sit in your assigned seats and work on something quietly at your desk…. Grab your notebook and a sharp pencil….

  2. Warm up • Draw the rock cycle then tell me how soil forms?

  3. Write in Notebook • How much of Earth's crust contains usable soil?

  4. Follow along … • On the next available page, draw a picture of the Earth make it big enough to cover the entire page

  5. Follow along… • As we complete each step, mark off the amount of unusable crust found on the Earth’s surface • Write each statement

  6. The Earth’s Unusable Crust • Step 1: Mark out three-fourths of the Earth (this represents the fact that 75 percent of the Earth is water) • Write: 75% of Earth’s is covered by water

  7. The Earth’s Unusable Crust • Step 2: Of the remaining 25%, half is composed of deserts, mountains, bogs, cities, and other areas that do not have usable soil. • Write: 12.5% of Earth is deserts, mountains, and cities

  8. The Earth’s Unusable Crust • Step 3: Of the small slice you have left, 75 percent has temperatures and weather conditions that prevent it from being used for cultivation. • Write: 9.375% of Earth has temperatures too hot or cold (weather)

  9. The Earth’s Unusable Crust • Add up all unusable amounts…. • 75% + 12.5% + 9.375% = 96.875% • That only leaves 3.125% usable soil on the Earth’s surface!!!!!

  10. So, How much is Usable? • Write: 3.125% of the Earth’s surface contains usable soil!

  11. Mr. Parr Soil Song • http://www.youtube.com/watch?v=gx2wVHeiTKE

  12. Soil Diagram • Find the next available page… • Make a circle in the middle of your paper • Write in center: SOILS • Now draw lines out from the circle as shown in the example

  13. Write in Upper Left • Soil ingredients are different: • 1. Parent rock (original rock from which soil was formed) • 2. Climate (temperatures, rainfall) • 3. Organisms found (worms, insects, rodents) • 4. Bacteria and fungi (decomposers)

  14. Write in Upper Right • Soils have different: • 1. Textures (size & type of particles) • 2. pH’s (acid/base 1-14) • 3. Fertility (minerals/nutrients) • 4. Moisture (water) levels • 5. Erosion rates

  15. Write in Bottom Left • Soil Texture: • Sand (largest particle size, feels gritty) • Silt (medium particle size, feels smooth or floury) • Clay (smallest particle size, feels sticky)

  16. Write in Bottom Right Soil horizons (layers) • A horizon: topsoil (surface layer); high in humus (organics) • B horizon: subsoil, high in minerals and clay, lower in organics • C horizon: larger rock fragments on top of parent rock (bedrock)

  17. Soil Horizons (layers)

  18. Soil Horizons Activity • You will receive a handout • You will color your handout and then tape into your book • Follow along as I show you the example

  19. Soil Stories Video • http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/soils/

  20. Remember, soils are different! • These different properties lead to a variety of soils types: • Some soils can support structures and plant growth while some can not!

More Related