Kinetic Theory
Describe thermal expansion.
objects, when heated, will expand in volume
In water, hydrogen has this charge.
What is positive?
The attraction of water molecules to other water molecules
What is cohesion?
What are fluids?
Anything that flows (gases and liquids)
Water is more or less dense when it is frozen?
less
What are amorphous solids?
Solids that act like liquids and "melt" like old farm house windows.
Why is water called "polar"?
It has a positive pole and a negative pole.
Water takes a lot of heat energy to increase its temperature.
What is high specific heat?
If there is more buoyant force than force of gravity, will an object sink or float?
float
What is Boyle's law for gases?
If you decrease the volume of a gas, the pressure will increase.
Give two examples of amorphous solids.
What is old windows and plastic.
Name the bond that holds the hydrogen from one water molecule to the oxygen of another water molecule.
What is a hydrogen bond?
Water can dissolve many substances
What is universal solvent?
If there is more force of gravity than buoyant force, will an object sink or float?
Sink
What is Charles Law for gases?
If you raise a gas's temperature, the gas's volume goes up.
The reason ice floats.
Water freezes by pushing away from itself and trapping air inside of the 6 sided ring (hexagon).
In water, this has a negative charge.
What is oxygen?
The attraction water molecules to OTHER TYPES of molecules?
What is adhesion?
What is Archimedes principle for fluids?
When an object is submerged in water, the amount of water moved is equal to the object's volume.
These are found in calculator screens, computer and table screens.
What is liquid crystal displays?
The chemical formula for water
H2O
Water is able to form a surface with its hydrogen bonds
What is the surface tension?
What is Pascal's principle for fluids?
When pressure is applied to a fluid, the pressure is felt equally throughout the fluid.
Explain the relationship between Bernoulli's principle for fluids and the design of an airplane wing.
If the speed of air is faster on top of the wing, the pressure is lower. If the speed is slower on the bottom, the pressure is higher creating lift.