2.3- Water Flashcards
(14 cards)
What causes water to have a high surface tension? What does the body use this for?
It’s hydrogen bonds.
It uses it as a lubricant.
What does a high heat of vaporization mean? What does the body use this for?
It takes a lot of energy to change temperature.
It keeps the body cool/maintains temperature.
Water has a high specific heat, what does this mean?
Temperature rises and falls slowly.
What happens to water when it freezes? What does this mean for aquatic life during winter seasons?
It becomes less dense and expands. The ice will float, allowing aquatic life to continue throughout winter.
Water is cohesive, what does this mean?
Molecules stick together with hydrogen bonds, allowing for capillarity action.
Water is adhesive, what does this mean?
Molecules stick (attract) to other polar molecules.
Water is a universal solvent, name two things that this helps with.
Helps chemical reactions in labs and in the body.
Dissolves substances in labs and in the body.
Some substances are “hydrophilic,” what does this mean? What type of molecules are hydrophilic?
“Water-loving.”
Polar molecules.
Some substances are “hydrophobic,” what does this mean? What type of molecules are hydrophobic?
“Water-fearing.”
Non-polar molecules.
Water’s high heat of fusion means what?
It takes a lot of energy to freeze.
Water helps with hydrolysis in the body, what does hydrolysis mean?
The break down of compounds.
Name four things that water helps lubricate or moisten in the body.
Saliva, joints, muscles, cell membranes.
Name two things where water is used to clean the body.
Saliva and tears.
Water reduces the weight of ____________ in the body and helps ____________ them.
Organs
Cushion
