- Sektör: Education
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Founded in 1879 and named after Texas' greatest hero General Sam Houston, Sam Houston State University is public shcool within the Texas state university system and located in Huntsville, Texas.
It's a multicultural institution that offers 79 bachelorette degree programs, 54 masters and five ...
The process or act of changing land into forest by planting trees, seeding, etc. on land formerly used for something other than forestry. This can obviously be contrasted with deforestation.
Industry:Chemistry; Weather
This cycle, lasting an average period of 11 years, involves recurring increases and decreases in the number of sunspots that occur on the sun's surface.
Industry:Chemistry; Weather
Water consists of two hydrogen atom and one oxygen atom (H<sub>2</sub>O). Water covers three-fourths of the Earth's surface, 60-70% of the world's weight, regenerates and redistributes through evaporation and other atmospheric processes. Water is involved in electrical charge separation because it has two types and positions of atoms giving it a net dipole movement. Water vapor also absorbs 17% of solar radiation in the troposphere, thus making it one of the two principal greenhouse gases. Of the solar energy absorbed by the Earth's surface a little more than half goes into latent heat, which is heat absorbed by water because of its transformation from a liquid to a gas. When these molecules condense back into a liquid, usually higher in the atmosphere, they released that energy back into the atmosphere as local warming.
Industry:Chemistry; Weather
The scattering of colors of visible light from white light by refraction off or passing through different media.
Industry:Chemistry; Weather
To lower, depreciate, or reduce. Often refers to emission reductions in air quality control.
Industry:Chemistry; Weather
The rate of decrease of temperature with increasing altitude in the atmosphere. If heat is neither gained nor lost from the air parcel under consideration, then the lapse rate is said to be adiabatic and the energy to expand the volume of the parcel or rising air comes from the kinetic energy of the gas molecules in that parcel. The expansion of the parcel causes these molecules net kinetic velocity to decrease and this is equivalent to cooling the air. In dry air the dry adiabatic lapse rate is about 9. 8 C/km (the sign is traditionally positive although the temperature is decreasing with altitude). See Foehn. In moist air the release of latent heat by condensation of the contained moisture makes the lapse rate lower,
Industry:Chemistry; Weather
This refers to the fact that our sun has probably increased its luminosity during its lifetime (approximately 3. 5 billion years). This assumption is based on astrophysical observations of many other stars. The best scientific conclusions are that when our sun was young it had a luminosity (total energy output) of 70-80% of what it is today; however, there has clearly been (based on geological records and long term evidence for the presence of liquid water) approximately the SAME long term planetary temperature on earth (about 15 degrees C, averaged planet-wide) instead of colder earlier surface temperatures followed later by warmer surface temperatures. This paradox suggests that the planet's surface temperature may have been controlled by atmospheric gases whose concentrations varied over time while keeping (via the greenhouse effect) the surface temperature relatively constant (see Gaia hypothesis).
Industry:Chemistry; Weather
The recycling of water on earth. There are five steps: Condensation occurs when water vapor in the atmosphere turns into a liquid and forms clouds. The clouds release precipitation in the form of rain, snow, or sleet when the moisture in the clouds becomes too heavy. Infiltration occurs when the water seeps into the ground, The infiltration rate depends on the permeability of the ground. When there is too much water on the surface to infiltrate into the ground, it becomes runoff and ends up in lakes, streams, or oceans. Evapotranspiration is a two part process driven by the sun. Evaporation occurs when water is turned into a vapor from the ground and transpiration is water loss by plants, The water vapor rises and starts the process over again.
Industry:Chemistry; Weather
Time measured in billions of years; a common measure of geologic time.
Industry:Chemistry; Weather
The time required for the concentration of a gas to decrease by 1/e of its original concentration due to a chemical reaction or other sink.
Industry:Chemistry; Weather
