A) a million
D. A million or more years
Stock concept doesn't have a time reference whereas Flow concept has time reference i.e. Stock concept gives the value at an instant of time while flow concept gives the values over a period of time.
Geologic time consists of eons, eras, periods, epochs, and ages. These measure periods of billions or millions of years.
a million or more years
Stock concept doesn't have a time reference whereas Flow concept has time reference i.e. Stock concept gives the value at an instant of time while flow concept gives the values over a period of time.
to provide reference to different events and occurences
Millions of million years, Billions of years, (Aeon).
The Earth has existed in roughly its present form for about 4.5x109 years.
The geologic time scale.
Geologic column is an ordered arrangement of rock layers that is based on the relative age of the rocks. Geologic time is the time IN the geologic column.
It means "a combining form meaning "old" or "ancient," especially in reference to former geologic time periods, used in the formation of compound words: paleobotany."
a geologic time scale has eras, made up of periods, epochs, etc. hope this helps! :D
a million or more years