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Published byBriana Agatha Lawson Modified over 9 years ago
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By Colin Ng(6) of 2O2
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Freezing These are the changes of states
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The process which a liquid’s (example a puddle of water) molecules becomes a gas happens when atoms or molecules escape from the liquid and turn into a vapor Can happen when liquids are cold or when they are warm Do you know why evaporation only happens only on the surface of water? I know I know !!It happens only on the surface of water as molecules liked to move from areas of higher pressure to lower pressure. The molecules are basically sucked into the surrounding area to even out the pressure.
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Things you will need: ~a large measuring jug ~ salt, a stick of chalk ~two bowls (both the same size) ~ a tape measure ~a plastic ruler
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Step 1 : Find two spots - a sunny area and a shady area of concrete Step 2 : Dissolve some salt in a large measuring jug of water Step 3 : Pour an equal amount of water onto the concrete forming two big puddles one in the sun and the other in the shade. Trace a line around the outside of each puddle Step 4 : Dissolve some more salt in some water and pour an equal amount of this into each bowl. Then place a bowl of salted water next to each puddle
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Step 5 : Measure across both the puddles with the tape measure and then measure the depth of the water in both the bowls with the plastic ruler and record the four measurements Step 6 : Return to the area every hour and keep measuring the puddles. You can keep drawing new lines around the puddles as they get smaller. Also check the jars each day to see what happens to the water and salt.
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is a process that results in the change of a substance from a solid to a liquid The energy of a substance is increased, typically by the application of heat or pressure, resulting in a rise of its temperature to the melting point, at which the rigid ordering of molecular entities in the solid breaks down to a less-ordered state and the solid liquefies Heat is taken in in the process of melting…
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Things you will need: ~Ice pieces ~Evaporation dish
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Experiment Leave ice pieces on a evaporation dish. Observe it every one hour and record it. What will you observe?
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is the formation of liquid drops from water vapor usually occurs when a parcel of rising air expands and cools occurs during the formation of dew keeps the Earth's climate cooler that it would otherwise be if there were no water Now I know what is condensation! !
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Things you will need ~yourself In cold weather Breathe out outdoor. What do you observe?
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TThings you will need ~~ a glass of icy cold water ~~ evaporating dish ~~a fridge IIn hot weather Pour out a glass of icy cold water from the fridge on a evaporating dish during a hot days. What do you observe?
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is the term for when matter undergoes a phase transition directly from a solid to gaseous form, or vapor, without passing through the more common liquid phase between the two Heat energy is absorbed when solid changes into a gas Heat is given out when a gas change into a solid
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Things you will need ~a spoon ~dry ice ~Bunsen burner
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Experiment First, To begin, warm a spoon by holding it above a flame for a few minutes. Next, place the spoon firmly against the chunk of dry ice. What will you observe?
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Is a process in which gas transforms into solid (also known as desublimation) Is the reverse of deposition is sublimation One example of deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid This is how snow forms in clouds, as well as frost and hoar frost on the ground Another example of physical deposition is the artificial process of physical vapor deposition, used to deposit thin films of various materials onto various surfaces!
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Is the process in which a liquid turns into a solid when cold enough Happens at 0°C for pure water Heat is given out in the process is a common method of food preservation which slows both food decay and the growth of micro-organisms Did you know that the temperature of a liquid stays constant in the process of freezing… Of course, I knew about it the moment I was born!! Also, I knew that when a liquid freezes, its particles slow down to take up fixed and orderly position in the solid.
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Things you will need: ~Water ~Freezer ~Cooking Oil ~Clear Plastic Container (like a glass or cup)
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Steps: 1. Pour some water into the clear plastic container 2. Add some cooking oil 3. Leave this for a few minutes 4. Put the container into the freezer for a few hours 5. Remove from freezer. The oil is now underneath the water
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http://www.youtube.com/watch?v=y9Nou6g -zwQ&feature=related ( evaporation) http://www.youtube.com/watch?v=y9Nou6g -zwQ&feature=related http://www.youtube.com/watch?v=qbQjukR mLSg (melting) http://www.youtube.com/watch?v=qbQjukR mLSg http://www.youtube.com/watch?v=HF_hLp H2yaQ&feature=related (freezing) http://www.youtube.com/watch?v=HF_hLp H2yaQ&feature=related http://www.youtube.com/watch?v=dABCml q2MNY&feature=related (condensation) http://www.youtube.com/watch?v=dABCml q2MNY&feature=related http://www.youtube.com/watch?v=0_LWBge Qrvk&feature=related (sublimation) http://www.youtube.com/watch?v=0_LWBge Qrvk&feature=related
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1. What are the 6 changes in state? 2. What is the change of state for Deposition, Sublimation, Melting, Freezing, Evaporation and Condensation? ( Example: Melting-from solid to liquid) 3. Why evaporation only happens at the surface? Note: please answer the question on a piece of writing paper. I will mark it! The one who got the most correct will get a prize.
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44) What is one example of Deposition? 55) Heat is taken in or given out for sublimation? 66) What are the brief description of each change?(Example: Evaporation is the process which a liquid’s (example a puddle of water) molecules becomes a gas)
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The Encyclopedia of World http://www.wardthomas.com/surveyform/i mages/Kitchen/elec_fridge_.jpg http://www.wardthomas.com/surveyform/i mages/Kitchen/elec_fridge_.jpg http://www.chem4kids.com/ http://www.chem4kids.com/ http://www.meltingpot.com/locations.aspx http://www.meltingpot.com/locations.aspx http://www.weatherquestions.com/What_is_ condensation.htm http://www.weatherquestions.com/What_is_ condensation.htm http://www.ace.mmu.ac.uk/eae/weather/old er/condensation.html http://www.ace.mmu.ac.uk/eae/weather/old er/condensation.html
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