Time

Part 1: 1)About how long ago did the big bang take place? The big bang theory took place approximately 13.7 billion years ago.  2) What is a black hole? Black holes are areas of intense gravitational pressure. 3) Does the universe continue to expand? The universe continues to cool and expand to this very day.  4) Was there really a big bang? No, there was not a big bang, although there was (and still is) an expansion. 5) What light elements seem to support the Big Bang Theory? The abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins  nce of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins  1)What is the current calendar most of the world uses / accepts? Explain who made it and why this is accepted. The Gregorian calendar is the internationally accepted civil calendar. 2) What is a leap year? Leap years add a 29th day to February, which normally has 28 days. The essential ongoing differentiating feature of the Gregorian calendar, as distinct from the Julian calendar with a leap day every four years  3) List three other types of calendars used and how they set up their calendar (ex. Lunar). The ancient Roman Calendar started its year on March 1st The Julian calendar continued to use January 1st as the first day of the new year. The Gregorian Calendar came about because a year is not exactly 365 days long. It is actually 365 and a quarter days long. Every 4 years, March 1st moved behind a day until after centuries instead of being early spring March 1st was now the beginning of winter. 4) What is BC? BC means, before Christ  5) What is BCE? BCE mean Before Common Era. 6) What is AD? AD mean Anno Dimini.  7) What is CE? CE means Common Era. 8) What is MYA? MYA means Million Years Ago  9) According to the timeline site how many periods of when are there and list time. There is 21 periods of time and they range from 14000 MYA till the future. 10) What is an eon, epoch, era, and age? 11) List three ancient calendars The Sun, Moon, planets, and stars — have provided us a reference for measuring the passage of time throughout our existence. Ancient civilizations relied upon the apparent motion of these bodies through the sky to determine seasons, months, and years The earliest Egyptian calendar was based on the moon's cycles, but later the Egyptians realized that the "Dog Star" in Canis Major, which we call Sirius, rose next to the sun every 365 days, about when the annual inundation of the Nile began. Based on this knowledge, they devised a 365 day calendar that seems to have begun around 3100 BCE, which therefore seems to be one of the earliest years recorded in history. Before 2000 BCE, the Babylonians (in today's Iraq) used a year of 12 alternating 29 day and 30 day lunar months, giving a 354 day year. 12) List two ancient clocks and how they worked. And ancient clock included watching the movement of the sun across the sky, and another was electromagnetic waves associated with the internal workings of atoms as their regulators.  13) What was a revolution of timekeeping? Accurate mechanical clocks. 14) What allows for standard more accurate clocks? Atoms.  15) What are time zones? A time zone is a region on Earth, more or less bounded by lines of longitude, that has a uniform, legally mandated standard time, usually referred to as the local time 16) What is the prime meridian? 17) If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii? Toronto-12:00 p.m. London-5:00 p.m.  Moscow-8:00 p.m  Tokyo-1:00 a.m  Hawaii-6:00 a.m.  18) What is Daylight Saving Time? Do we use this in Saskatchewan?  The change to Daylight Saving Time allows us to use less energy in lighting our homes by taking advantage of the longer and later daylight hours. No I don’t think we use Daylight Saving Time in Regina.  19) Is there a year zero? No, there is no year zero. 20) Are we starting a new decade in 2010 or 2011? In 2011.  21) What is linear time? Linear time is a concept whereby time is seen sequentially, as a series of events that are leading toward something: beginning, and an end. In Newtonian theory it is something absolute in reality, regardless of human perception. 22) What is cyclical time? Cyclical time sees time as circular, not necessarily leading towards something, but repeating itself in a cycle of events. === 

=== 1) What happened at 12 AM January 1, 2004? Earth formed from planetary nebula  2) What happened at 4:41 PM February, 25 2004? Inferred origin of life (first cells) 3) How long of actual time happened between the event in question one and two? 700 million years.  4) What happened at 3:39 PM September 3, 2004? First multi-celled organisms (seaweed and algae) 5) What happened at 7:40 PM November 21, 2004? Ordovician system begins  6) What happened at 1:27PM December 2, 2004? First sharks 7) What happened at 12:09 PM December 12, 2004? End of Paleozoic, 96% of all life on Earth perishes  8) What happened at 8:37 PM December 13, 2004? First dinosaurs (Eoraptor and Saltoposuchus) 9) What happened at 7:52 PM December 26, 2004? End of Mesozoic, probably meteor or comet impact  10) What happened at 5:18 PM December 31, 2004? Oldest human like ancestors (hominids) 11) What happened at 11:48 PM December 31, 2004? First modern man, Homo sapiens  12) What happened at 12:00 AM January 1, 2005? World War II 13) How long of actual time happened between the event in question 11 and 12?  937 million years.  14) How old is the Earth? The earth is 4.6 billion years old. 15) On the chart how many years are represented by one second? 146 years are represented by one second.