Properties of Water and Important for Life
this makes them "stick" to each other with a strong attraction called a ____
hydrogen bond
the oxygen atom attracts its shared electrons____ , so the oxygen atom has a slightly ____ charge
strongly, negative
water has a strong ___
surface tension
aquatic life can live without rapid/deadly changes in ____
temperature
water is a ____
terrific solvent
this is also why water can bead up into droplets on ____
glass surfaces
water is drawn up the tube, against ___, by the forces of ____ and ___
gravity, cohesion, adhesion
it takes a lot of ____ for water molecules to leave their ___, held together by ____
heat energy, liquid form, hydrogen bonds
water has a ___
high specific heat
high specific heat means it takes ____ of energy to change a body of water's ____
a lot, temperature
____
action
water has a relatively high ____ and ___ of ____ for a small ____
boiling point, heat, vaporization, hydride molecule
surface water molecules can evaporate when they gain enough ___ to break free from the ____ of the molecules around them
energy, hydrogen bonds
water is great for carrying these ___ and ___ within ___ or ____ between different body ____
ions, molecules, cells, blood vessels, tissues
many___ and ___ necessary for life____ in water
ions, polar molecules, can dissolve
ice is ___ than water
less dense
scientists believe ____ is a requirement for life to exist, which is why we keep looking for it!
liquid water
because water does not boil at a ____, most water on the planet is found in the form of ____, which is essential for life!!
lower temperature, liquid
many ___ in our solar system have evidence of ice and perhaps ____ is underneath
moons, liquid water
molecules at the surface hold ____ to each other than molecules further ____ the surface
more tightly, under
some life depends on being able to float ____
on top of the surface
is there water on ____?
other planets?
Water Molecules are very ____
polar
the hydrogen has a slightly ___ charge
positive
water moves up ____ tubes within plants
thin
most planets are ____ or ____ for liquid water to exist
too hot, too cold
this also allows for some animals to live on the ____
top of ice!
ice forms at the ____ because of the ____. Aquatic organisms that live underneath the ice in the water are ___ from extreme cold by the ice
top, cold air, insulated