View source for AY Honors/Water Science - Advanced/Answer Key/es

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<!-- 1. Tener la especialidad de Ciencia de agua. -->
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<!-- 2. Ilustrar y describir brevemente cómo cada estado físico de agua contribuye al clima de la tierra. -->

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<!-- 3. Discutir con un grupo los efectos de agua por las inundaciones y la erosión. -->

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<!-- 4. Explicar los siguientes términos con referencia a los cambios en el estado de agua: -->
[[File:Aggregate phase.svg|thumb|400px|Transiciones de fase del agua]]
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<!-- 5. Ser capaz de explicar e ilustrar con fotografías, diagramas o dibujos las siguientes clases de agua: -->
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Snow water is rain water that comes through the atmosphere at freezing temperatures below 32 °F or 0.0 °C.
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De-ionized Water is water that has gone through a purification process where salts have been removed; such as sodium, calcium, chloride, and bromide.
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Raw Water is considered water that has not gone through any type of purification process. This type of water is found in lakes, rivers, and rain water containing millions of germs and viruses.
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Hard Water is water that is saturated with minerals such as calcium, iron, magnesium, and many other inorganic minerals. Water in lakes, rivers, and well water is considered hard water.
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<!-- 6. What is a watershed? Discuss with a group the importance of watersheds. -->
A watershed is a considerably large area of land where rainfall or melted snow is gathered at a lower elevation point.
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A group discussion with Pathfinders and staff should be conducted to understand the importance of watersheds. Selected topics of interest could include their protection and the role they play with regard to our water supply.
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Note that ground pollution is generally picked up by water as it flows downhill, so any pollution within the watershed will be concentrated at the lower elevation. Since watersheds cover such vast areas, they can pick up an enormous amount of pollutants and concentrate them in a much smaller area.
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<!-- 7. How does filtering water make it clean? -->
The process of filtering water removes impurities such as sediments, bacteria, protozoa, and microbial cysts (that can cause disease) from water by means of a fine physical barrier. Chemical and biological processes are also used to filter water. A filter is designed to cleanse water to certain levels, depending on what purpose the water will serve. Irrigation, drinking water, aquariums, and swimming pools are common applications of water filtering.
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<!-- 8. On your own or with a group, perform the following experiment and explain in your results what can be done to keep clean water sources. -->
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<!-- 9. Develop a spiritual application from water and share it with your group. -->
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There are many angles to use in developing a spiritual application. Here are some ideas to get you going:
*Jesus as the Living Water
*Filtering pollutants vs preventing pollution as applied to sin.
*The Earth as a watershed for sin when Satan and his angels were cast to the Earth.
*The hydrosystem as created vs its present state after 6000 years of sin.
*Distillation as an illustration of being born again.
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==References==
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