Educational toys cold

Educational toys cold My son Jack and I took some 'time to play with educational toys that he received for Christmas and went to a hockey game during the holidays. Like most 7 years, her favorite is when the Zamboni comes out to clean the ice. We had seen a thousand times what was hampered when Jack said: "Why is there smoke coming out from behind? "And I told Jack that use steam as hot water freezes faster. I could see the wheels tu and now I knew I was in my head. "But the ice is cold, you should not use cold water, Dad." Well, there was only one period to go to a thousand questions, most of which I did not have answers to, so I told Jack that when at home we our experiment to see whether hot or cold water freeze faster . To get the most out of this thought we should treat it as a scientific project. I looked through some of the science toys Jack had and found a game that showed how to do scientific experiments. Jack and I made a plan and a list of all the things we need. We also searched the Inteet to see if there are educational toys that can help. Not found educational toys, but there are some very interesting elements. It appears that there are at least 3 physical processes that explain why hot water freezes faster. First, the hot water contains less dissolved air, which is why the fish can die in very hot water, lack of oxygen. Liquids conduct heat better than gas, such as hot water to cool quickly. Secondly, in a pool of hot water, the water surface, which then heats the water, warm salt water. This would create a greater difference in temperature with fresh air and the water faster. Third, the initially hot water melt the ice in the soil, forming a bond that better cool the water faster. This also prevents the ice chipping away. Like a pitcher that fills with hot water and a pitcher with a second cold water. We took 2 plastic glasses and a short 2x4 outside. We filled each cup half full, with warm red and blue with cold water and put them on their feet. Then we found a patch of ice on the road, of which the 2x4 in the center, and pour hot water on one side and cold on the other side. F 18 E 'so we went to warm up. We retued to an hour later. 2 cups water to a large extent. The red was a little 'ice above the water line and the blue was a little' ice on the outer surface. Along the way, both sides of the 2x4 had tued to ice. When we hit the ice you can see our fingerprints on the cold water. The warm water is partially frozen. We were sure that we showed not only that, but rushed towards the interior, wrote in our comments have some photos and had some hot chocolate before bedtime. I knew Jack was going to be excited when he explained his science experiment for your class on Monday. So the next time you see the steam rising behind the Zamboni one knows why. As for my skating rink behind, if I can wrap the tube around the barbecue in the garden ...