million residents. This means the demand for consumable water is high‚ and with this demand comes depletion. Many areas of the Central and West Coast Basins are experiencing ground water depletion‚ which has resulted in an intrusion of saltwater in coastal aquifers‚ “natural filters that trap sediment and other particles (like bacteria) and provide natural purification of the ground water flowing through them” (Idaho Museum of Natural History). The Water Replenishment District of Southern California has
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drowns it means that their lungs (respiratory system) has been blocked from receiving oxygen by a liquid. Majority of the time it is water that people drown in. “Drowning is the third most common cause of accidental death worldwide‚ accounting for 7% of all injury related deaths” (MedicineNet). Water is the most common way that people drown‚ but the two types of water that is common to Earth in masses are freshwater and saltwater. Both can drown you but in completely difference ways. Drowning in saltwater
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Heat of vaporisation. f. . Melting point g. Boiling point 4. Why do gases diffuse rapidly? 5. Write the relationship between Celsius scale and Kelvin scale of temperature. 6. Why does the level of water not change when salt is dissolved in water? 7. How can matter change its state? 8. Define boiling. Why boiling is considered as bulk phenomenon? 9. Why does the temperature of a substance remain constant during melting and boiling even when heat is being supplied
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A battery‚ which is actually an electric cell‚ is a device that produces electricity from a chemical reaction. In a one cell battery‚ you would find a negative electrode; an electrolyte‚ which conducts ions; a separator‚ also an ion conductor; and a positive electrode. Batteries are made of magnesium dioxide‚ graphite‚ electrolytes‚ zinc oxide and a paper soaked in an electrolyte solution. All of this is sealed in a insulated tube for safety. http://answers.ask.com/consumer_electronics/other/what_are_batteries_made_of
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an egg will float in salt water. The question is how much salt is needed to be added to the water to make the egg float. The problem is that no one knows how much salt is needed to make an egg float. Hypothesis It will take at least three teaspoons of salt to be added to the water for the egg to float. The reason why I think three teaspoons of salt will need to be added to water for the egg to float is because the egg a density that is lower than the density of the salt water. Background information
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Environmental Impacts of the Battery The creation of the battery was invented in 1859 by a man named Gaston Plante. Over the years as technology advances so do they batteries adding different materials like nickel‚ zinc‚ lead‚ graphite‚ carbon and toxic acids such as acid‚ magnesium dioxide‚ and hydrochloric acid making it one of the most helpful inventions known to mankind. Throughout our everyday lives a lot of things we use require a battery. The disposable battery converts chemical energy into
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Blank 1 Blankity Blank Blankity Blank Mr. Blank 4/9/02 Effects of Salts on the Freezing Point of Water In this experiment‚ you will study the effect that several solutes have on the Freezing Point of water. When a solute is dissolved in a liquid‚ the temperature at which that liquid freezes decreases‚ because the molecules of the solute become attached to the water molecules‚ making it more difficult for the water to form its crystaline shape and form into ice. This process is called Freezing
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Marisela Andrade The Effects of Salt Water on Gummy Bears Facilitated diffusion depends on passive transport. Molecules cross cell membrane by diffusion. A type of diffusion is osmosis. If no energy is input into the system during diffusion‚ the molecules will reach a state of equilibrium. The purpose of this experiment was to study why the death occurred among those who drank salt water. Two blue gummy bears had a height of 2 centimeters each. The mass of these gummy bears together were
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SCIENCE PROJECTS:The Effect of Salt on the Boiling Temperature of Water(Initially prepared by a 4th Grade student)To quickly jump to a section below click on:INITIAL OBSERVATIONCooking instructions tell you to add salt to water before boiling it.PROJECT TITLEThe Effect of Salt on the Boiling Temperature of WaterPURPOSE OF THE PROJECTTo find out how table salt affects the boiling temperature of water.HYPOTHESISAdding table salt to boiling water will cause the water to boil at a higher temperature
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Experiment 5: Percent Water in a Hydrated Salt Chemistry 1300 Instructor: 2/8/12 Abstract: The purpose of this experiment was to determine the percent by mass in a hydrated salt‚ as well as to learn to handle laboratory apparatus without touching it. The hydrated salt‚ calcium carbonate‚ was heated with high temperature to release water molecules. Gravimetric analysis was used in this experiment to determine the percent by mass of water in a hydrated salt. The hypothesis of this experiment
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