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1. How do cohesion and adhesion play a role in surface tension?
2. How are cohesion and adhesion alike? How are they different?

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1) What are ionic bonds?
2) What causes surface tension?

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1) What is the difference between surface tension and capillary action?
2) What is cohesion?

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1. Why is water a neutral molecule
2. How does hydrogen bonding occur

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1.) What is surface tension?
2.) What is adhesion?

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Claim: Surface Tension
Evidence: Paper clip floated on water
Reasoning: Water forms hydrogen bonds. Water molecules are attracted to each other, causes surface tension and allows paper clip to float on surface of water

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Claim: Water can exhibit surface tension
Evidence: paper clips floating on water.
Reasoning: Because water form hydrogen bonds. These bonds helps water molecules be attracted to each other and build beads to allow small things to float.

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claim: water displays the property of surface tension

evidence: paperclips float in water

reasoning: because water forms hydrogen bonds water molecules are attracted to each other and that attraction causes surface tension and allows for the paperclip to float

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Claim: the ice will float on water
Evidence: The ice floats on top of the water
Reasoning: The water molecules are less dense due to hydrogen bonding. The way the hydrogen bonds are spaced it causes the water to become less dense.

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Claim: water is  more dense than ice

Evidence: Ice floats on water

Reasoning: When water freezes (ice) the  water molecules form a structure maintained by hydrogen bonding. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density

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Claim: Water exhibits the property of cohesion.

Evidence: The paper clips floats on the surface of the water.

Reasoning: The property of surface tension is demonstrated because the molecules at the surface of the water form stronger bonds to keep the paper clip afloat.

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Claim- Hydrogen and oxygen atoms are attracted to each other due to the negative and positive charges
Evidence- Water droplets on the penny bonded and formed above the penny
Reasoning- because negative charge is oxygen and positive charge is the hydrogen and opposites attract they bond together.

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Claim: Water displays the property of surface tension
Evidence: The paper clips could float on top of the water in the dish. Surface Tension
Reasoning:  It would not break the hydrogen bond because water forms hydrogen bond water molecules are attract to each other and that causes surfaces tensions and allows the paper clips to float.

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Claim: water exhibits the property of surface tension
Evidence: The paper clips floated on top of the water
Reasoning: Because water molecules bond together and they create a smooth surface which is surface tension

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Claim: Water displays the property of surface tension
Evidence: Paper clips float in water, Dome of water forms on penny
Reasoning: Because water forms hydrogen bonds, water molecules are attracted to each other and that causes surface tension and allows for the paper clip to float.

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Griffin Hergert and Jenna Sefcik 10/15/18

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Griffin Hergert and Jenna Sefcik 10/15/18

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Claim: Water exhibits the property of surface tension.
Evidence: Paperclip floated in the water and the dome of water forms on the penny.
Reasoning: Water forms hydrogen bonds this s because the attraction between water molecules this is what allows the paperclip to float and the dome to form on the penny.

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Ice floats on water because it is less dense.

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Review the properties of water and post  an example of  Claim, evidence and reasoning. Include your name and today's date.

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Surface Tension:

The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.

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Claim: Water exhibits the property of polarity .
Evidence: Water droplets on the wax paper were attracted to each other.
Reasoning:Because water is a polar molecule. That is, it has one side that is partially positively(H+) charged and one side that is partially negatively(O-) charged. When two water molecules get close together, the polar forces work to draw the molecules together through hydrogen bonding . Therefore, water droplets tend to attract to each other.

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the positive and negative charges of the hydrogen and oxygen atoms that make up water molecules makes them attracted to each other.

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Claim: Water exhibits the property of Cohesion.
Evidence: Water Groups together and sticks together on top of the penny.
Reasoning: Because water can have as many as 4 hydrogen bonds at the same time, the water molecules are attracted to each other,  and they therefore group up on top of the penny.

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Capillary action, from USGS Water-Science School

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Information about capillary action, from the USGS Water Science School.

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Thanks to the forces of cohesion (water molecules like to stay close together) and adhesion (water molecules are attracted and stick to other substances).