Glossary of Terms. Bronchus / Bronchi / Bronchioles. The airways of the lungs. When a person takes in a breath of air, the air travels through the nose or mouth, into the larynx, then into the trachea, which is the main passageway into the lungs. The trachea divides into a right and left main bronchus.
Plant and animal life, atmosphere and water are the major causes of weathering. Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanical and chemical.
Weathering is the breakdown of rocks into small particles (sediment) due to physical, chemical, or biological interactions. Physical weathering can result. from the repeated freezing and thawing of water entering small cracks or pores. in rocks, or from temperature fluctuations causing expansion and contraction.olish: rockâs high luster created by ice grinding and smoothing rock. Till: Pile of boulders, rocks, clay and gravel left by the movement or melting of a. Weathering: processes that chemically or physically change rock at or near the. 20,000-25,000 years ago.