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