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The Wonders of Water: Properties, Adhesion, Cohesion, and More

Discover the polar nature of water, how it forms hydrogen bonds, its adhesion and cohesion properties, high heat capacity, and why it's the universal solvent. Learn about capillary action, surface tension, and why ice floats. Explore the amazing features that keep organisms thriving through the unique qualities of water.

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The Wonders of Water: Properties, Adhesion, Cohesion, and More

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  1. PROPERTIES OF WATER

  2. Water is Polar • Water is a polar molecule, meaning that there is an uneven distribution of charge • Water has a slight negative charge near the oxygen and slight positive charge near the hydrogen atoms.

  3. Water forms hydrogen bonds • Because they are polar, water molecules are attracted to each other. • The negative oxygen is attracted to the positive hydrogen • Many of water’s special properties come from its ability to form hydrogen bonds

  4. Adhesion & Cohesion • Cohesion is an attraction between molecules of the same substance. • Adhesion is an attraction between molecules of different substances.

  5. Surface Tension • Cohesion can cause surface tension. • Since the water doesn’t have to bond with anything “above it’ those bonds are stronger and the water skeeter can walk on it

  6. Capillary Action • Adhesion can causes capillary action • Water can get pulled up small tubes, like the veins of plants

  7. Water expands as it freezes • Ice is less dense • Hydrogen bonds push water molecules further apart from each other • Ice floats on water • Protects organisms underneath • Acts like insulation

  8. The Universal Solvent • Water can disassemble and rearrange other molecules

  9. High Heat Capacity • Water can absorb & release large amounts of energy without changing temperature • Keeps cells at even temperatures • Stabilizes global temperature • Evaporative cooling • “Specific heat”

  10. This is my doggie Otis

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