Soil Composition and profile

Vocabulary  for Class November 24-December 5

Bedrock                                                              Soil profile

Humus  (hyoo-muss)                                          Subsoil

Organic material                                                 Topsoil

Pore space                                                           Regolith (review)

Horizon


Not in glossary but will be covered in class:

Silt                                                              Gravel
Sand                                                            Clay






  GRAVEL SOIL  pictured above

We'll also cover the specifics of the concept of soil horizons.   Check out the image below.
A, B, C, and O horizons in the soil



UPDATE 12/1

This week's big ideas:
Superposition
Geologic column
Fossils
Two views about the age of the earth