Properties of Water- Polarity, Adhesion, Cohesion, and Surface Tension

Oxygen will attract the electrons in a water molecule _________ the Hydrogen atoms

• less than

• more than

• the same amount as

Based on what you already know, would you say the Hydrogen bonds are weak or strong bonds?

• weak

• strong

Water molecules will stick to each other, this is called?

(you can re-watch this section if you can't remember)

• adhesion

• cohesion

Why does ice float on liquid water?

• Hydrogen bonds keep the water molecules farther apart as they stop moving as fast

• Some of the molecules evaporate so the molecules squeeze together

Why does sweating make us cooler?

• being wet is cooler

• evaporation takes energy, so it removes energy from our skin when sweat evaporates

Remember to let the video run to the end so that it will post your grade.

Did you watch the whole thing?

• yes

• Really?