Weathering-Erosion-Soil

Question Answer
is the process that breaks down rock and other material on Earth’s surface. Weathering
is the movement of broken down rock particles by wind, water, or ice. Erosion
two types of weathering: Mechanical (Physical) and Chemical
is when rock is broken down physically. Mechanical weathering
The grinding away of rock particles by other rock particles carried by wind, water, or ice. Abrasion
When water freezes in a crack of a rock, the water expands and makes the crack larger. This will happen over and over again until the rock eventually breaks. Freezing and Thawing
When water freezes in a crack of a rock, the water expands and makes the crack larger. This will happen over and over again until the rock eventually breaks. This process is also called ice wedging
Rock can be heated by the sun very quickly and it might start to flake. Rain can quicken this process by cooling the rock fast and causing
it to crack.
Heating and Cooling
Animals that dig in the soil can loosen and break apart rock while they are digging. Animal Actions
Roots of plants may enter cracks in rock, as they grow they can make the crack in the rock larger and even break it over time. Plant Growth-
is the process that breaks down rock through chemical changes. Chemical weathering
The agents of chemical weathering are water, oxygen, carbon dioxide, living organisms, and acid rain.
Water is the most important agent of chemical weathering because it can dissolve almost anything over time, even rock. That is why water is known as the universal solvent because it can dissolve so many things. Water
Oxygen plus water can lead to some rocks and metals rusting in a process known as oxidation. Oxygen
If _______ dissolves in water it can produce a weak acid that will weather some rock. Carbon Dioxide
Some plants roots produce week acids that help break down rock as they grow. Living Organisms
Air pollution can cause acids to form in clouds which produce acid rain, which can break down rock.

Acid Rain
Is the loose weathered material on Earth’s surface in which plants can grow. Made of rock, minerals, air, water, and humus. Soil
Soil is made of the following substances: * rock
* minerals
* air
* water
* Humus
Soil Horizons
Some decomposers are: * Earthworms
* Protists
* Bacteria
* Fungi