Structure and behavior of water
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Structure and Behavior of Water. Video-Slow Motion Water Droplet. Video-Slow Motion Water Droplet 2. Why Study Water?. Water is essential for all life forms on Earth and is found in all ecosystems Water exists naturally in all 3 states of matter on Earth which is rare

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Structure and behavior of water

Structure and Behavior of

Water

Video-Slow Motion Water Droplet

Video-Slow Motion Water Droplet 2


Why study water
Why Study Water?

  • Water is essential for all life forms on Earth and is found in all ecosystems

  • Water exists naturally in all 3 states of matter on Earth which is rare

  • Water has some unique and amazing properties

  • Understanding the characteristics of water lead to a better understanding of future science courses


Review
Review

  • The following few slides reviews concepts about water that have already been covered, but are still important to know for this unit.


Phase transitions
Phase Transitions

Review Concept

vaporization

melting

condensation0

freezing


Phase diagram
Phase Diagram

Review Concept

water


Heating curve for water
Heating Curve for Water

Review Concept


“Universal Solvent”

Water can dissolve ionic and polar compounds

Video-Water Dissolving NaCl Sodium Chloride


Hydrogen bonds
Hydrogen Bonds

The forces of attraction between one water molecule and another is called hydrogen bonding. It is a strong force that helps give water some of its important characteristics.


Surface tension
Surface Tension

  • The hydrogen bonding or forces of attraction between water molecules, they create a strong force at the surface.

  • That’s how some insects and small animals can ‘walk’ on water.

Video-Walking on Water

Video-Walking on Water 2


Structure of ice
Structure of Ice

  • As ice, water is unique because it EXPANDS.

  • Most liquids contract when they become frozen.

  • This happens due to the way the water molecules fit together which take up more space than when it’s a liquid.

  • This explains why ice floats on top of water because it is less dense.

  • The frozen polar ice caps and frozen lakes help to protect marine life living underneath.


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