Hydrogen Bonding
Name_______________
Surface Tension, Capillary Action, and Density of Ice
Date___________B____
Water is ____________________ and has an ______________________ oxygen atom which makes
it very __________. The oxygen side of water has a partial ______________ charge and the
hydrogen side of water has a partial _____________ charge. This is called a __________ . Water is
attracted to other water molecules by ______________ ________ where the negative _________
side of one water is attracted to the positive _____________ side of another water molecule.
Because water is very _________ and can hydrogen bond with itself it has several unique properties!
One of water’s unique properties is its high __________________ ___________________ . All
liquids have surface tension that acts like a “_________” that is stretched tight across its surface.
Water’s surface tension is especially high because water molecules are ______________ to each
other by hydrogen bonding. When particles of the same substance are attracted to one another it is
called ____________.
A second unique property of water is how well it undergoes __________________ _____________.
Water is so polar it can also be attracted to other polar _______________ while “sticking” to itself.
This can be seen in the familiar ________________ shape formed inside small glass tubes. This
attraction between water and other substances is called _______________and allows water to travel
up materials against gravity. In trees for example, water is absorbed by the roots and travels up the
xylem (veins of the tree). Water can “climb” up materials because as the water molecules are
attracted up the walls of a surface (_______________) they simultaneously drag other water
molecules along (_______________).
Hydrogen Bonding
Name_______________
Surface Tension, Capillary Action, and Density of Ice
Date___________B____
In liquid water, molecules are ___________________ and more ______________ arranged by
changing hydrogen bonds. As liquid water ______________, the molecules ___________________
and hydrogen bonds arrange them into a __________________ shape. It also explains why
_____________________ take the crystalline shapes they do. Finally, the fact that the density of ice
is _____________ than water explains why lake freeze from the ________ first instead of from the
bottom. This ______________________ the water underneath protecting wildlife during the winter.