A) a million
D. A million or more years
A million or more years best fits the concept of geologic time. Geologic time spans millions to billions of years and is used to describe the immense length of time over which Earth's processes have occurred, such as the formation of mountains, evolution of species, and movement of continents.
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
Some popular songs that reference the concept of time intervals include "Time After Time" by Cyndi Lauper, "Clocks" by Coldplay, and "Time Is on My Side" by The Rolling Stones.
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."
an era is a very long span of geologic time