1st Nine Weeks Flashcards
what is water considered
A polar substance because it has opposite charges
ice is _______ dense than water
less
condensation occurs
when the temperature of gas close to 100°C it changes back to a liquid
water is called the ______ because it dissolves more substances than anything in the world
universal solvent
capillary action
combined force of attraction among water molecules and w/molecules of surrounding materials
condensation
process by which gas changes into liquid
evaporation
process by which molecules @ surface of liquid absorb enough energy to change to gaseous state
specific heat
amount of heat needed to increase the temp of certain amount of a substance by 1 degree Celsius
surface tension
tightness across surface of water caused by polar molecules pulling on each other
capillary action facts
- explains how water moves against force of gravity
* due to attraction among molecules of water and surrounding materials
capillary action allows
water to move up a straw
mixture of cohesion and high adhesion
evaporation facts
- occurs as water molecules absorb energy
- occurs @ surface of liquid
- example - drying hair after swimming
condensation facts
- occurs as water molecules slow down
* example - clouding up cold window w/breath
cohesion
ability of H20 molecules bonding w/other H20 molecules
adhesion
ability of molecules to stick to other substances
