Soil Formation & Horizons

Slides:



Advertisements
Similar presentations
Soil The product of weathering of rocks
Advertisements

Chapter 2: Weathering & Soil.
Chapter Menu Chapter Introduction Lesson 1Lesson 1Weathering Lesson 2Lesson 2Soil Chapter Wrap-Up.
DO Now: You find a sedimentary rock that has one graded bed. Describe how you know which layer of the graded bed is formed last?
Student Learning Objectives. 1. Identify five factors involved in soil formation. 2. Describe different types of parent material. 3. Explain topography.
UNIT SEVEN: Earth’s Water  Chapter 21 Water and Solutions  Chapter 22 Water Systems  Chapter 23 How Water Shapes the Land.
Chapter 6 Weathering and Soil
Section 3: Soil Preview Key Ideas Soil Soil Characteristics
Weathering and Organic Processes from soil
WHAT’S IN THE SOIL? And why is it important?. Sand  Drains well but can not hold onto nutrients. Sand is a large particle.  Form lightweight, free-draining.
Weathering and Soil Formation
Do Now In your own words, describe what soil is and what it’s made up of.
SOIL. Soil: is a mixture of weathered rock particles and other materials.
12.2 Soil Key Ideas: Soil is made of weathered rock and organic material. Climate and other factors affect the composition of the soil.
Do Now 10/8/13 1.Which type of crust is more dense? 2.What type of luster would a diamond have? 3.List four agents of erosion. 4.What is deposition?
Soil. Mechanical and chemical weathering of rocks form soil. Soil covers much of the land on Earth. It is made up of minerals, air, water, and organic.
Soils: One of Our Natural Resources!. Some call it dirt…..But it is Soil !!! Soil is made of loose, weathered rock and organic material.
RATES OF WEATHERING Factors of Rates of Weathering 1. Parent Material (The rocks themselves) - Igneous and metamorphic most resistant, sedimentary least.
Soils & Soil Formation-The Results of Weathering
Soils: One of Our Natural Resources!. Some call it dirt…..But it is Soil !!! Soil is made of loose, weathered rock and organic material.
The Earth’s surface is always changing!
Soils: One of Our Natural Resources!. Some call it dirt…..But it is Soil !!! Soil is made of loose, weathered rock and organic material.
From Bedrock to Soil.  Bellringer In your notebook answer the following questions: Has there always been soil on Earth? What makes soil valuable to humans?
Chapter 2 Lesson 2 SOIL.
What is Soil? How is it made?.
Soil Defined as the part of dirt that will support life
The Nature of soil.
What eventually happens to sediments? Soil is formed!
Chapter 2: Weathering and soil formation
9.2 Rates Of Weathering.
The Nature of Soil Essential Question:
Weathering, Erosion, and Soil Notes
SOIL.
Factors of Soil Development
The Nature of Soil Essential Question:
Erosion, Deposition AND SOIL FORMATION
Soil Formation Soil is an important natural resource
Weathering.
Soils.
Soil Formation – Explain how natural actions such as weathering, erosion(wind, water and gravity) and soil formation affect Earth’s surface.
Chapter 10 Table of Contents Section 1 Weathering
Weathering Test Date: 2/26/16.
Soil & Soil Horizons.
Chapter 14: Weathering & Erosion.
SOIL - NOTES.
The Nature of Soil Essential Question:
What eventually happens to sediments? Soil is formed!
What is different about these soils?
Soils.
What eventually happens to sediments? Soil is formed!
Soil Notes Aim: How does soil form?.
Chapter Introduction Lesson 1 Weathering Lesson 2 Soil Chapter Wrap-Up
Weathering and Soil Information
Soil Components.
8th Grade: The Dynamic Earth (Module E)
What is soil? Soil is a mixture of weathered rock, decayed organic matter, mineral fragments, water, and air. Lesson 2-1.
5.2: Soil regolith: layer of rock and mineral fragments created from weathering soil: part of regolith that can support plant life.
Soil forms slowly as a result of mechanical and chemical processes.
One of Our Natural Resources!
SOIL SES3b. Explain how soil results from weathering and biological processes acting on parent rock.
Introduction to Agriculture, Food, and Natural Resources
Warm-up.
Bell Ringer Test Thursday. Start studying! Type of Weathering
WEATHERING AND SOIL Weathering - breaking down of rocks Types
Learning Objective: I will be able to explain deposition of particles in water.
Goal
Soil Formation Lesson 3.
One of Our Natural Resources!
Soils.
9.2 Rates Of Weathering.
Presentation transcript:

Soil Formation & Horizons Chapter 2- Weathering and Soil

Everything else on the counter. What you need today: Pencil Bellringer sheet Everything else on the counter.

Bellringer # 2 Wildflowers can bloom in all sorts of places, including the desert. Plants need many things to survive, including water and sunlight. But in the desert, as elsewhere, the composition of soil determines whether or not plants will grow. The plants shown here can grow in desert soil, but not on solid rock. 1. Describe the soil of a desert. How does it compare to the soil where you live? 2. Why is it difficult for most plants to grown on a solid rock? 3. Do you think that all plants could grow well in desert soil if you added water?

Today’s Objectives Students will be able to: Identify evidence of chemical weathering. Explain how chemical weathering changes rock. Differentiate between chemical and mechanical weathering.

Formation of Soil- Parent Material Why are there so many different types of soil? The kinds of soils that form depend on five factors of soil formation. The starting material of soil is called parent material. Parent material is made of the rock or sediment that weathers and forms soil. The particle size and type of parent material can determine the properties of the soil that develops.

Factors that Affect Soil Formation: Climate The average weather of an area is its climate. If the parent material is in a warm, wet climate, soil formation can be rapid.

Factors that Affect Soil Formation: Topography Topography is the shape and steepness of the landscape. The topography of an area determines what happens to water that reaches the soil surface. Water running downhill can carry soil with it, leaving some slopes bare of soil.

Factors that Affect Soil Formation: Biota Biota is all of the organisms that live in a region. Biota in the soil help speed up the process of soil formation in various ways. Organisms can be involved in decomposition of organic matter or form passages in soil for water to move through. Rock and soil are affected by organism activity. Mature soils develop layers as new soil forms on top of older soil.

Factors that Affect Soil Formation: Time As time passes, weathering is constantly acting on rock and sediment. This means soil formation is a(n) constant, but slow process

Horizons Horizons are layers of soil formed from the movement of the products of weathering. There are three horizons common to most soils. Each horizon has characteristics based on the type of materials it contains. The A-horizon is the part of the soil you are most likely to see when you dig a shallow hole; it contains most of the organic matter in the soil. The B-horizon usually contains a great deal of clay particles. The C-horizon consists of parent material. The top, organic layer is called the O-horizon and the unweathered, bedrock layer is the R-horizon.