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8properties of water
biochemistry
Term | Definition |
---|---|
Polar | -electrons are not shared equally in the covalent bond of a water molecule -polar molecules attract themselves to each other and to other polar molecules |
high specific heat | -water resists temperature changes -water can absorb a lot of heat before it begins to get hot -this is why water is valuable to organisms, industries and in your car's radiator as a coolant -it acts as an insulator to help maintain constant condition |
expands when frozen | -ice is less dense than liquid water and will float on the surface of liquid -instead of getting more dense when it freezes, water actually expands when it freezes into ice -this causes ice to float. if ice sunk, then during winter a lake or even ocean |
cohesion surface tension | -water is polar and its molecules are attracted to each other, this creates a "tight" surface layer -water is sticky and elastic and tends to clump together in drops rather than spread out in a thin film -this property is the reason small insects can "w |
adhesion | water sticks to other materials and substances |
capillary action | -because of surface tension, water likes to "creep up" small tubes -this process is called capillary action -capillary action allows water (and its dissolved substances) to move through the roots of plants and through the tiny blood vessels in our bodie |
universal solvent | -because water is polar it can dissolve more substances than any other liquid -this means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients solution= solvant+solute |