There are many types of weather phenomena, including events such as El Nino and common occurrences such as wind, rain and snow. The different types of weather develop because of the Earth's various air masses and fronts.Know More
The various types of weather relate to the Earth's climate, which is generally defined as average weather and includes temperature, precipitation and the processes that produce change in them. However, weather changes develop because of the primary air masses and their movements around the planet. Air masses are identified by four primary types:
Cold and dry masses originate over polar land areas, while cold and moist masses originate over water and in polar regions. Similarly, warm and dry masses originate over tropical land areas, while warm and moist masses originate over water and in tropical regions. Once air masses form, they move to other places and cause weather changes. Seasonal shifts in air masses cause mild summers or dangerously cold winters.
Many types of weather, such as El Nino, La Nina, Arctic Oscillations and the Pineapple Express, result from the movement of air masses. As air masses move, they collide to create fronts.
Cold fronts occur when a cold air mass moves in to replace a warm one; the phenomenon often produces thunder storms. When a warm air mass replaces a cold one, a warm front occurs and rains often results. Stationary fronts occur when two masses meet but are not moving. Occluded fronts occur when the cooler air in two systems meet.Learn more about Erosion & Weathering
Wind erosion happens when pieces of the Earth are worn away by strong winds over time, and water erosion happens when moving water such as ocean waves wear away rock instead of seeping into the ground. Water is a more powerful erosion force than wind.Full Answer >
Wind and water erosion are least likely to affect igneous sills and cooled lava flows. Limestone, basalt and quartzite are also unlikely to undergo erosion or weathering, as are sandstone and chert. Soil and soft rocks such as clays erode very quickly without protection.Full Answer >
According to the CK-12 Foundation, the most common examples of wind erosion are rock formation and desert varnish. Wind erosion can also affect much smaller rocks and structures, as evidenced by the desert pavement in the Mojave Desert.Full Answer >
According to CK-12, ice wedging causes rocks to weather because water expands as it changes from a liquid form to a solid form. Over time, the changes in form wedge the rock apart. For this reason, ice wedging is very effective at weathering rock.Full Answer >