Time

__**Big Bang Theory**__
 * 1) About how long ago did the big bang take place?** 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?** It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos, all of which is inside of an expanding universe that began as an infinitesimal singularity which appeared out of nowhere for reasons unknown.
 * 4) Was there really a big bang?** Experts say that it wasn't an explosion; there was (and continues to be) an expansion on the universe.
 * 5) What light elements seem to support the Big Bang Theory?**
 * First of all, we are reasonably certain that the universe had a beginning.
 * Second, galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble's Law," named after Edwin Hubble (1889-1953) who discovered this phenomenon in 1929. This observation supports the expansion of the universe and suggests that the universe was once compacted.
 * Third, if the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Radioastronomers Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-454.765 degree Fahrenheit, -270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable universe. This is thought to be the remnant which scientists were looking for. Penzias and Wilson shared in the 1978 Nobel Prize for Physics for their discovery.
 * Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins.

Time Keeps On Slippin’ 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] . It was made by [|Pope Gregory XIII]  2) What is a leap year? Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100; the centurial years that are exactly divisible by 400 are still leap years. For example, the year 1900 is not a leap year; the year 2000 is a leap year. 3) List three other types of calendars used and how they set up their calendar (ex. Lunar). The tabular lunar calendar is used to calculate the date of Easter. One of the 30 arrangements applies to a century (for this purpose, the century begins with a year divisible by 100). When the arrangement to be used for a given century is communicated, anyone in possession of the tables can find the age of the moon on any date, and calculate the date of Easter 4) What is BC? Before Christ 5) What is BCE? Before Common Era 6) What is AD? Anno Domini or Year of our Lord referring to the year of Christ’s birth.7) What is CE? Common Era and is used in place of A.D. 8) What is MYA? Million Years Ago 9) According to the timeline site how many periods of when are there and list time. -Big Bang Theory – 14000 MYA
 * -Formation of the earth – 4600 MYA
 * Cambrian: Explosion of life on the earth – 543-490 MYA
 * Permian: Largest mass extinction – 290-248 MYA
 * Mesozoic: Age of the dinosaurs – 245-65 MYA
 * Stone Age: Human era – 5 MYA – 2500 BC
 * Ice Age: Extinction of large mammals – 70000-8000 BC
 * Neolithic: First Permanent Settlements – 9000-4500 BC
 * Bronze Age: First Pharaohs – 3200-1200 BC
 * Iron Age: Start of the Trojan War – 1200-332 BC
 * Hellenistic Period – 332-63 BC
 * Roman Period – 63 BC – 476
 * Byzantine Period – 330-1453
 * Middle Ages – 476-1350
 * Renaissance – 1350-1600
 * Reformation – 1500-1600
 * Enlightenment – 1600-1800
 * Industrial Revolution – 1750-1900
 * 20th Century – 1900-2000
 * 21st Century - 2099
 * Future – 2009

11) List three ancient calendars - Aztec Calendar Stone  - The stars   - The Stonehenge   12) List two ancient clocks and how they worked. - Egyptian shadow clock – It was a sundial used when the sun moved, the shadow would determine what time it was. -Early Water Clock - stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. They were designed to slowly fill with water coming in at a constant rate. Markings on the inside surfaces measured the passage of "hours" as the water level reached them. These clocks were used to determine hours at night, but may have been used in daylight as well. 13) What was a revolution of timekeeping? Accurate Mechanical Clocks.   14) What allows for standard more accurate clocks? Aztec Clock   15) What are time zones? Time zones are different times in the world.   16) What is the prime meridian? The zero meridian (0), used as a reference line from which longitude east and west is measured. 17) If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo?  Hawaii? 12 PM; 5PM; 8PM; 1AM; 6AM 18) What is Daylight Saving Time? Do we use this in Saskatchewan? Every [|spring] we move our clocks one hour ahead and "lose" an hour during the night and each [|Fall] we move our clocks back one hour and "gain" an extra hour. 19) Is there a year zero? No,  20) Are we starting a new decade in 2010 or 2011? -2010  21) What is linear time? In computer science, the time complexity of an algorithm quantifies the amount of time taken by an algorithm to run as a function of the size of the input to the problem    22) What is cyclical time? Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time. 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 happen at 3:39 PM September 3, 2004? Oldest age-dated rocks on Earth 5) What happened at 7:40 PM November 21, 2004? Ordovician system begins 6) What happened at 1:27 PM 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? 62 Years 14) How old is the Earth? 4.6 Billion Years 15) On the chart how many years are represented by one second. 1 Billion
 * Geological Time Activities**