2.2 properties of water leq: what are the properties of water? assignment: reading 2.2, 32.1...
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2.2 Properties of Water
LEQ: What are the properties of water?
• Assignment: Reading 2.2, 32.1
• Activator: glaciers– What are your opinions on global warming?– Later: summarize how ice can be used as a biological
record of history
• Key terms – cohesion, adhesion, solvent
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2.2 Properties of Water
Hydrogen bonds are responsible for unique chemical properties.
• Chemical properties:– cohesion
- sticks to itself
– adhesion- sticks to other
things
– versatile solvent- “universal”
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2.2 Properties of Water
Hydrogen bonds are responsible for unique properties:
• Physical properties:– States:
- liquid, gas
- Solid – ice formation
- Floatation!
– Specific heat- stays cool, hot
- stores energy
- moderates temperature
- boiling, freezing
– Surface tension- elastic (next slide)!
- capillary action
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2.2 Properties of Water
Possible sentences:
– Pretend that you are writing to a person who has little or no scientific expertise:
– Explain to them the significance of water to life on Earth using three vocabulary terms or less
- Clarify any term you use by providing an example, analogy, etc.
– Share your responses with your group
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2.2 Properties of Water
Summary:
• List three properties of water:– Explain how hydrogen bonds contribute to these
properties