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The difference between hard and soft water
Collect some hard water from a stream(or make some as defined in the next experiment). Also secure some soft water like as rain water or distilled water. Make some soap solution by dissolving soap shavings or powdered soap in a little warm water. Place equivalent amounts of hard and soft water in every of two bottles. Add soap solution to the soft water with a dropper, some drops at a time. Shake the bottle well after every addition. Count the number of drops of soap solution required to produce suds about 1 cm thick on the top.
Differentiate between soil water content and plant available soil moisture. The mass of water lost relative to mass of dry soil is called soil water content whereas plant avai
Fingerprinting the Stars: Astronomers use various methods to measure the distances to stars. For determining the distances to nearby stars, the method of stellar parallax is
Why do organisms need water? Organisms need water for the following reasons: (i) All cellular processes need water as a medium. Usually, the reactions that take place in our
how much bones are in human body?
This assignment relates to working with an individual in a social care setting to plan, carry out and evaluate an activity which promotes the development of the individual. The can
In the following table state how gymnosperms are adapted for living on land with respects to each of the following aspects Aspect Adaptation for living on land Alternation of Gener
What are covalent bonds? Covalent bonds are those in which electrons are shared by the atoms, and this sharing results in an attraction between the atoms to form a molecule. A
State the categories of bulky organic manures These are evaluated mainly on the basis of their nitrogen content and the amount of organic matter present in them. The two import
Procedure 1. Soak the emptied glassware in disinfectant or liquid soap solution overnight. If you use disinfectant, dip the glassware in soap solution before washing, Rub clean
what is global warming?
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