True or False. The most important agent of chemical weathering is abrasion.
True or False. Plant roots that force cracks in rocks farther apart are an agent of mechanical weathering.
True or False. The gas that causes rock containing iron to oxidize is carbon dioxide.
True or False. Freezing and thawing are an example of chemical weathering.
True or False. Acid rain causes very rapid mechanical weathering.
Contour plowing is a practice that involves disturbing the plant cover as 'what' as possible?
The loose, weathered material on Earth's surface is called what?
The rate of weathering depends on the type of rock and on the type of soil, climate, loam, or type of humus?
The grinding away of rock by other rock particles carried by wind, water, or ice is called what?
The process that breaks down rocks and other materials at Earth's surface is called what?
Fungi, protists, bacteria, and worms are the main soil: weatherers, litter, materials, or decomposers?
The movement of rock particles by wind, water, ice, or gravity is called what?
George Washington Carver taught what to Southern farmers in the early 1930's?
What kind of soil is best for growing plants? Clay soil, loam, humus, or sand soil
Plant roots do not cause 'what' of the soil?
What is the process that breaks down rock and other substances at Earth's surface?
The area of the Great Plains where wind erosion caused soil loss in the 1930's is called what?
This refers to the average weather conditions in the area.
What is the dark colored material that forms as plant and animal remains decay?
What is it called when rock material is full of small holes and air pockets that allow water to enter?
What is the loose, weathered material on Earth's surface in which plants can grow?
What is the management of soil to prevent to its destruction called?
Plowing fields along the curves of a slope to prevent soil loss is what?
The layer of soil that differs in color and texture from the layers above or below it, is the what?
What is the method in which the dead stalks from the previous year's crop are left in the ground to hold the soil in place?
