Best Answer: Hi, Answer: estÃ¡ means is. Comments: There are two words for is in Spanish: estar and ser. EstÃ¡ is the third person singular, present indicative ...
The Largest division in the geological time scale is the Precambrian Era.It lasted from around 4.6 billion years ago to 570 million years ago.
enables scientists from around the world to correlate the geologic events, environmental changes, and the development of life-forms that are preserved in the rock record. GEOLOGIC TIME The oldest division of time is at the bottom of the geologic time scale. Moving upward on the scale, each division is younger, just as