Ankur answered this
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Saurish Kumar answered this
Hard Water
1. Hard Water. This is saturated with calcium, iron, magnesium, and many other inorganic minerals. All water in lakes, rivers, on the ground, in deep wells, is classified as hard water. (Many city systems take water from rivers or lakes, or reservoirs supplied with mountain water; they erroneously call their supplies "soft water" but it is soft only in comparison with water which is harder.)
Boiled Water
2. Boiled Water. Boiling helps remove some of the germs, but concentrates the inorganic minerals. Other germs are carried into a fertile element for rapid and lusty propagation of germs and viruses already in the body.
Raw Water
3. Raw Water. This has not been boiled. Raw water may be hard (as calcium hardened water) or soft as rain water. It contains millions of germs and viruses. In every densely inhabited drop. Some of these viruses and bacteria may adversely affect the thyroid gland, the liver and other vital body organs.
Rain Water
4. Rain Water. This has been condensed from the clouds. The first drop is distilled water. But when it falls as rain, it picks up germs, dust, smoke, minerals, strontium 90, lead and many other atmospheric chemicals. By the time rain water reaches the earth it is so saturated with dust and pollutants it may be yellowish in color. Water is supposed to act as an atmosphere purifier. If we had no air pollution, we would have far less pollution in our drinking water.
Snow Water
5. Snow Water. This is frozen rain. Freezing does not eliminate any germs. All snowflakes have hardened mineral deposits. Melt the cleanest snow and you will find it saturated with dirt, inorganic minerals, germs and viruses.
Filtered Water
6. Filtered Water. This water has passed through a fine strainer, called a filter. Some calcium and other solid substances are kept in the filter; there is no filter made which can prevent germs from passing through its fine meshes. Each pore of the finest filter is large enough for a million viruses to seep through in a few moments. A home filter usually only picks up suspended solids and is effective for the time, maybe only for hours, until it is filled up. Then it is ineffective even for removing suspended solids, and at the same time becomes a breeding ground for bacteria.
Soft Water
7. Soft Water. This water is soft in comparison with water which is harder. It may contain many trace minerals and chemicals, viruses and bacteria. It is not to be confused with "softened water." Soft water may be classified as water which is harder than distilled water.
Reverse Osmosis
8. Reverse Osmosis. This is a system of water purification which allows pre-filtered water to be forced through a semi-permeable membrane to separate impurities from our drinking water. However, this membrane allows only certain molecules to pass through providing the water pressure is exactly constant. The matter of water pressure is a problem still to be solved. Furthermore, the membrane also allows some iron and nitrate molecules to pass through. Another problem to be solved.
But it now seems promising that we can look forward to tremendous strides in this system of water purification. Gulf Oil, Culligan and Eastman Kodak are sponsoring vast research in this area. High purity water between 90 and 97 percent of the dissolved mineral (and organic solutions), and over 99 percent of the suspended and colloidal particles are rejected by, the special membrane which has been developed for this process by these companies in their research. The product water, from this new research, is ultra-clear, low in dissolved solids, practically free from hardness components and essentially sterile as produced. This makes a close second to distilled water.
De-ionized Water
9. De-ionized Water. A process of exchanging "hard" ions for "soft." The total ions are still present. The end result is the same. But the water has the appearance of being distilled. (Nature recognizes transformation but not extinction!) Since water leaving the sodium-cation exchanger has little hardness, it contains sodium salts.
Distilled Water
10. Distilled Water. This is water that has first been turned into steam so that all of its impurities are left behind. Then through condensation, it is turned back into pure water. It is the only pure water. The only water free from all contamination. Distilled water may well be considered the only pure water on earth.
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Hridhita Anjal answered this
Water In Various Forms
Subject Area: Science
Unit Title: Matter
Grade Level: 4th & 5th grade
Objectives: Each student will understand the 3 states of water: solid, liquid and vapor.
Colorado Content Standards to be covered:
SCienCe
Standard i - Students understand the processes of scientific investigation and design, conduct, communicate
about, and evaluate such investigations.
Standard ii - Physical Science: Students know and understand common properties, forms, and changes in
matter and energy.
Anticipatory Set: Handout the Matter of Fact handout and have your students fill in the answers as you go
through the lesson.
Materials:
a measuring cup
2 small paper cups
a paper towel
water
an adult with a hot plate or stove
a pinwheel
input:
Water can be found in three forms or states - liquid, solid or gases.
Does it matter? Sure, it does. If you’re thirsty, you can’t drink a cloud or an ice cube. All things are made of
matter. Matter takes up space. It can take 3 forms: solid, liquid or gaseous.
Solids have shape and volume. They do not change shape easily.
Liquids have volume, but they have no shape of their own. They take on the shape of the container they are
in.
Gases have no shape or volume. Most gases are invisible.
Did you know that the water you used to brush your teeth this morning might have been a drink for a
dinosaur millions of years ago?
Procedures/Activities:
Forms of Water experiment
Photocopy the following experiment with places for students to answer questions.
Checking for Understanding: At the end, choose one of the following for a quick check: ask the students to
partner share and think, pair and share, do a quick 3 word write up as an exit slip, do a quick sketch or give
each other a quick thumbs up or down to check for understanding. Determine the level of mastery for each
student and provide individual remediation as needed.
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Sushma answered this
to: navigation, search
Water is a chemical compound with the chemical formula H
2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at standard ambient temperature and pressure, but it often co-exists on Earth with its solid state, ice, and gaseous state (water vapor or steam). Water also exists in a liquid crystal state near hydrophilic surfaces.[1][2]
Water covers 71% of the Earth's surface,[3] and is vital for all known forms of life.[4] On Earth, 96.5% of the planet's water is found in oceans, 1.7% in groundwater, 1.7% in glaciers and the ice caps of Antarctica and Greenland, a small fraction in other large water bodies, and 0.001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation.[5][6] Only 2.5% of the Earth's water is freshwater, and 98.8% of that water is in ice and groundwater. Less than 0.3% of all freshwater is in rivers, lakes, and the atmosphere, and an even smaller amount of the Earth's freshwater (0.003%) is contained within biological bodies and manufactured products.[5]
Water on Earth moves continually through the water cycle of evaporation and transpiration (evapotranspiration), condensation, precipitation, and runoff, usually reaching the sea. Evaporation and transpiration contribute to the precipitation over land.
Safe drinking water is essential to humans and other lifeforms even though it provides no calories or organic nutrients. Access to safe drinking water has improved over the last decades in almost every part of the world, but approximately one billion people still lack access to safe water and over 2.5 billion lack access to adequate sanitation.[7] There is a clear correlation between access to safe water and GDP per capita.[8] However, some observers have estimated that by 2025 more than half of the world population will be facing water-based vulnerability.[9] A recent report (November 2009) suggests that by 2030, in some developing regions of the world, water demand will exceed supply by 50%.[10] Water plays an important role in the world economy, as it functions as a solvent for a wide variety of chemical substances and facilitates industrial cooling and transportation. Approximately 70% of the fresh water used by humans goes to agriculture1. Hard Water. This is saturated with calcium, iron, magnesium, and many other inorganic minerals. All water in lakes, rivers, on the ground, in deep wells, is classified as hard water. (Many city systems take water from rivers or lakes, or reservoirs supplied with mountain water; they erroneously call their supplies "soft water" but it is soft only in comparison with water which is harder.)
Boiled Water
2. Boiled Water. Boiling helps remove some of the germs, but concentrates the inorganic minerals. Other germs are carried into a fertile element for rapid and lusty propagation of germs and viruses already in the body.
Raw Water
3. Raw Water. This has not been boiled. Raw water may be hard (as calcium hardened water) or soft as rain water. It contains millions of germs and viruses. In every densely inhabited drop. Some of these viruses and bacteria may adversely affect the thyroid gland, the liver and other vital body organs.
Rain Water
4. Rain Water. This has been condensed from the clouds. The first drop is distilled water. But when it falls as rain, it picks up germs, dust, smoke, minerals, strontium 90, lead and many other atmospheric chemicals. By the time rain water reaches the earth it is so saturated with dust and pollutants it may be yellowish in color. Water is supposed to act as an atmosphere purifier. If we had no air pollution, we would have far less pollution in our drinking water.
Snow Water
5. Snow Water. This is frozen rain. Freezing does not eliminate any germs. All snowflakes have hardened mineral deposits. Melt the cleanest snow and you will find it saturated with dirt, inorganic minerals, germs and viruses.
Filtered Water
6. Filtered Water. This water has passed through a fine strainer, called a filter. Some calcium and other solid substances are kept in the filter; there is no filter made which can prevent germs from passing through its fine meshes. Each pore of the finest filter is large enough for a million viruses to seep through in a few moments. A home filter usually only picks up suspended solids and is effective for the time, maybe only for hours, until it is filled up. Then it is ineffective even for removing suspended solids, and at the same time becomes a breeding ground for bacteria.
Soft Water
7. Soft Water. This water is soft in comparison with water which is harder. It may contain many trace minerals and chemicals, viruses and bacteria. It is not to be confused with "softened water." Soft water may be classified as water which is harder than distilled water.
Reverse Osmosis
8. Reverse Osmosis. This is a system of water purification which allows pre-filtered water to be forced through a semi-permeable membrane to separate impurities from our drinking water. However, this membrane allows only certain molecules to pass through providing the water pressure is exactly constant. The matter of water pressure is a problem still to be solved. Furthermore, the membrane also allows some iron and nitrate molecules to pass through. Another problem to be solved.
But it now seems promising that we can look forward to tremendous strides in this system of water purification. Gulf Oil, Culligan and Eastman Kodak are sponsoring vast research in this area. High purity water between 90 and 97 percent of the dissolved mineral (and organic solutions), and over 99 percent of the suspended and colloidal particles are rejected by, the special membrane which has been developed for this process by these companies in their research. The product water, from this new research, is ultra-clear, low in dissolved solids, practically free from hardness components and essentially sterile as produced. This makes a close second to distilled water.
De-ionized Water
9. De-ionized Water. A process of exchanging "hard" ions for "soft." The total ions are still present. The end result is the same. But the water has the appearance of being distilled. (Nature recognizes transformation but not extinction!) Since water leaving the sodium-cation exchanger has little hardness, it contains sodium salts.
Distilled Water
10. Distilled Water. This is water that has first been turned into steam so that all of its impurities are left behind. Then through condensation, it is turned back into pure water. It is the only pure water. The only water free from all contamination. Distilled water may well be considered the only pure water on earth.
Water is so valuable to the entire system of the human body that it is wise to use only the Best. Use pure steam distilled water for health and well being.
Heavy Water
Used in the manufacture of nuclear energy and weapons.
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