Water - Liquid Awesome: Crash Course Biology #2 Review

surface tension

A measure of how difficult it is to stretch or break the (cohesion force) surface of a liquid

Solution

A mixture that forms when one substance dissolves another.

A hydrophobic substance

A molecule that cannot break the cohesive forces of water and therefore is fearful of water

Solute

A substance that is dissolved in a solution.

Hydrogen bonds

Attraction between negative Oxygen atom and a more positive Hydrogen atom of different water molecules

Cohesion

Attraction between two objects that are the same (water to water)

Water is less dense as a solid

Because of hydrogen bonds spreading water molecules out during bonding to form a lattice formation

Polarity

Difference in charge within the molecule

Capillary action

Movement of water through a tube against gravity through adhesion and cohesion

"Like dissolves like"

Polar objects dissolve other polar objects. Non-polar objects dissolves non-polar objects

Water is a polar molecule because

The O and H ends of the molecule have different charge, allowing the O of one molecule to attract the H of a nearby molecule

principle behind sweating

Water removing heat to regulate the bodies temperature

Solid, Liquid and Gas

What are the forms of water called?

Two hydrogen atoms and one oxygen atom

What is water made up of?

high heat capacity

absorbs and releases large amounts of heat before changing temperature

Water is an excellent _____________

solvent