Rain, snow, and sleet return water from the atmosphere to Earth's surface. On the ground, the water cycle continues with infiltration, the process in which surface water seeps into the soil where it can become groundwater. The amount of water that infiltrates into the ground depends on many factors, such as soil type and rock type. Topography also influences infiltration — a steeper slope forces the water to run off more quickly, preventing much infiltration. In addition, if the soil is already saturated with water, it cannot absorb much more, which leads to an increase in runoff.
• Water droplets formed from condensation that are small remain suspended in the atmosphere in atmosphere in the form of clouds in the sky or fog at ground level. Dust particles need to be present around which the droplet can form. 3. Precipitation • Under the correct temperature and atmospheric pressure, the small water droplets in clouds become larger and precipitation occurs • This can be in the form of rain, hail, sleet or snow. 4.
Haileigh adams 3rd Hour 1/7/11 The Water Cycle (The Hydrologic Cycle) Definition: Water cycle; the process of which the various forms of water move about the planet in a fairly constant balance. The water cycle has no true beginning and no true ending, except the water changes from a liquid to a solid such as water turns into ice crystals then into snow and also hail. Also there could be turned into water vapor. The cycle is the process by which the water, in whatever form, goes from place to place, ocean to cloud to rainwater to river and back through a cycle of rising air currents, precipitation, runoff and a few other processes. Rising air currents take water, as vapor, up into the atmosphere; with the water form of "evapotranspiration," which is water transpired or from plants and that has evaporated from the soil.
Water is a powerful source. It causes erosion or more specifically runoff. The source of a river may come from a mountain. When it rains on the mountains it may create a stream, then later into a river. It turns into a river because of all the water the mountains have and then creates a path.
The demand for freshwater, especially in arid regions, has driven people to create and implement new and more effective ways to remove salt from water. Desalination occurs naturally as part of the hydrologic cycle. The Sun evaporates water from the ocean. The vapor, condensed by cooler air in the atmosphere, forms rain clouds. The rain from these clouds reaches the ground as pure liquid water.
It absorbs much water vapour from the oceans and land vegetation through evaporation. As this air rises it cools. Eventually the water vapour condenses into clouds and it then creates precipitation. So the equatorial region is both hot and wet. The air rises, then spreads horizontally to the north and south.
Both runoff of fresh water from the land and rainfall may dilute water along the seashore. Alternatively, tide pools may become saltier than the sea because of evaporation during exposure at low tide. Both perturbations tend to increase in magnitude as height above the mean low tide line increases (Laboratory Manual for Principles of Biology, 1992). [pic] Figure 1. The marine intertidal zone.
A riffle is a shallow, fast moving section of a stream and is usually followed by a run, where the water tends to be deeper and slower. On the other hand, a pool usually has a water velocity close to zero, where most of the sediment and nutrients float down and settle at the bottom. In a shallow, coastal Pacific stream, organic matter particles travelled further in a fast, shallow riffle than a slow, deep pool. Furthermore, most of the stiff, heavier particles like rocks and clay in this stream were retained in deeper water (Hoover, 2009). This illustrates the affects of water velocity on movement and deposition of sediment.
sd10/29/11 4th Period Chemistry EC Acid rain is any kind of precipitation with higher levels than usual of nitric and sulfuric acid contained in them. The causes for acid rain can be both natural and man-made, but the effect of acid rain is harmful in many different aspects. Acid rain is caused by chemical reactions, chemicals are released into the air, and they mix with precipitation and come down as rain. This can goHow acid rain starts How acid rain starts on for days, and spread far. Some natural causes for these chemical reactions include erupting volcanoes and rotting vegetation.
What is acid rain? Acid rain or acid deposition is a broad term that describes any acidic form of precipitation from the atmosphere. There are two types of acid deposition: wet and dry. Dry deposition includes acidic particles, gases and dust that are deposited from the atmosphere, whereas wet deposition includes rain, hail, snow and fog. Unlike dry deposition, winds can blow wet deposition hundreds of miles away from the source of emission, making it an issue for everyone.