Water Properties Project- Surface Tension and Boiling/Freezing points by Katherine Smith https://padlet.com/55042/ylb5qfd47xee Ella Emad and Katie Smith en-us 2017-04-27 13:59:46 UTC 2017-05-03 14:32:27 UTC hello@padlet.com Surface Tension 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168636766 Surface tension is the property that allows a liquid to resist an external force, due to the cohesive nature of its molecules. The cohesive force between molecules explains the phenomenon known as surface tension 

]]> 2017-04-27 14:01:08 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168636766 Real World Application 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168882734 Some bugs and animals can "walk" on water because they have a wax on their legs that keeps them from breaking through the surface of the water. Surface tension is also the force that makes bubbles and water droplets round. The walls of the bubble or water are pulled equally by the surface forces, creating a spherical shape

]]> 2017-04-28 14:01:14 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168882734 Human/Global Impact 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168884023 Surface tension is what allows things to float, along with density. If the weight of an object does not weigh more than the water it displaces, it will float. This happens because the water molecules like to stick together, and will only be broken by a strong enough force, thus, the object would sink. If things weren’t able to float in water, we would not be able to use water transportation.

]]> 2017-04-28 14:05:36 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168884023 Relationship to Chemistry 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168884374 When rain forms and falls from clouds, the surface tension hold the water molecules together to form droplets. The clouds themselves are formed when water droplets form around particles of dirt in the air, and because of their surface tension they can stick together. ]]> 2017-04-28 14:06:47 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168884374 Sources 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168884906 https://water.usgs.gov/edu/surface-tension.html 
https://en.wikipedia.org/wiki/Surface_tension 
]]> 2017-04-28 14:08:44 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168884906 Relationship to Water Cycle 55042 https://padlet.com/55042/ylb5qfd47xee/wish/168885630 When rain forms and falls from clouds, the surface tension hold the water molecules together to form droplets. The clouds themselves are formed when water droplets form around particles of dirt in the air, and because of their surface tension they can stick together.]]> 2017-04-28 14:11:20 UTC https://padlet.com/55042/ylb5qfd47xee/wish/168885630 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169446986 2017-05-02 15:05:20 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169446986 Video 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169528950 Surface tension of a penny]]> 2017-05-02 19:24:33 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169528950 Freezing/Boiling Points 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686397 Freezing point: The temperature at which a given substance changes from a liquid to a solid. 
Boiling point:The temperature at which a given substance changes from a liquid to a gas]]> 2017-05-03 14:19:36 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686397 Real World Application 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686503 A real world example of water freezing is ice cubes. They cool things down, and ice can be used to treat injury. A very common example of boiling points is boiling water to make food, like pasta. ]]> 2017-05-03 14:19:57 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686503 Relationship to Chemistry 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686545 When a substance is heated the molecules get really excited and move around a lot, and as they move around more space is created between the molecules essentially having the substance take up more space. When a substance is frozen, the particles slow down to the point where the attractions arrange them into fixed positions. Water molecules specifically freeze in a hexagonal pattern and the molecules are further apart than when they are in a liquid state.]]> 2017-05-03 14:20:06 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686545 Relationship to Water Cycle 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686632 Overnight, water cools and usually forms dew on the ground and other surfaces. When the sun comes up, it heats up the water and it evaporates into the air.  During the winter when lakes freeze over, the ice floats at the top and then melts again when the weather starts to get warm.]]> 2017-05-03 14:20:21 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686632 Human/Global Impact 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686731 We need to know freezing and boiling points in chemistry to successfully execute chemical reactions, and predict how the reaction will occur. This will ultimately furthering our knowledge on chemistry and help us understand things to the molecular level. ]]> 2017-05-03 14:20:33 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686731 Video 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686796 This video is a time lapse of the water we boiled. It bubbles because the water molecules get really excited and move around much more when they're hot. ]]> 2017-05-03 14:20:43 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686796 Sources 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169686847 https://www.mansfieldct.org/Schools/MMS/staff/hand/atomsheat.htm
http://www.middleschoolchemistry.com/lessonplans/chapter2/lesson4
]]> 2017-05-03 14:20:50 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169686847 Another Video 55042 https://padlet.com/55042/ylb5qfd47xee/wish/169690658 We also put food dye in the water when it was boiling to show how much the water molecules move around when they get hot, which is why the dye mixed with the water so quickly]]> 2017-05-03 14:31:07 UTC https://padlet.com/55042/ylb5qfd47xee/wish/169690658