### period:

Real time
* Real Time Describes an event that takes place over the internet as if it was in real life.
* Refers to applications which perform tasks without delay.
* is modeled as a discrete quantity using clocks and time variables
  - such that two moments of it never coexist
  - the characteristic of handling big data
* means that one second of video takes one second to send across the Internet.
* refers to the time it actually took the computer to return the answer to the screen.
* shows up in probability theory and statistical physics.

### period:

Season
* All seasons have many sunny days
  - their own beauty and function
* Every season changes because the temperature changes with the seasons.
* Most seasons affect germination
  - growth
  - wheat germination
  - create conditions
* Most seasons have storms
  - weather
  - means allergies
* Most seasons occur during months
  - winter months
* Some seasons bring drought
  - intense drought
* Some seasons occur during rainy seasons
  - require for reproduction
* Some seasons start in autumn
  - early autumn
  - springs
* Turn the disc to set the month and see where the sunlight falls on the tilted Earth.
  - reproduction, too
  - the solar angle for shade and penetration
* also affect the amount of radiation that the Earth receives.
* are a subdivision of a year
  - also a factor in successful wildlife watching
  - an evident component of climate
  - cause by the tilt of the axis relative to the planet's orbital motion
* are caused because of the Earth's changing relationship to the Sun
  - by the Earth's rotation, tilt, and revolution around the sun
  - divided into short, moist, and moderately warm summers and long, cold, and dry winters
  - due to changes in the distance of earth's orbit about the sun
  - generally more defined than in the Arid desert, with low rainfalls during the winter
  - groups of changes in a year
  - more clearly distinguishable by rainfall and wind direction than by temperature
  - opposite on either side of the equator
  - part of years
  - the result of the earth's yearly revolution around the sun
  - time periods
  - very important in the life of a frog
* begin at different times in the United States.
* cause taste.
* change as another day passes
  - because the Earth revolves around the sun in a period of one year
  - in the ocean much as they do on land
  - the amount of natural light entering through windows
* change with the splash and splendor of color
* come and go, bringing death and rebirth
  - pass while activity of all living things adapts
  - favorable conditions
* determine the growth of an apple
  - natural lactation cycle of all milking animals
* go and seasons come, birds migrate, trees shed their leaves, and babies are born.
* greatly affect animal behavior.
* have effects
  - impact
  - little impact
  - measurable effects
  - significant effects
* keep on going year after year, but a butterfly lives only once.
* last for months
  - several weeks
  - from weeks
* mark transitions.
* mean very little in our world of two hemispheres.
* occur because of the tilt of a planet while it revolves around the Sun
  - two factors working together
  - due to the tilt of the Earth's axis and the orbit of the Earth around the Sun
* represent the fluctuations of the mind.
* result from the axial tilt of the Earth
  - variations in the amount of the sun's energy hitting the surface
* span months.
* spawn dust storms while polar caps swell and shrink.
* vary according to species.