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

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”

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

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

2.2 Properties of Water Summary: List three properties of water: –Explain how hydrogen bonds contribute to these properties