Time

= Big Bang theroy = = 1) About how long ago did the big bang take place? = = 13.7 billoin years ago = = = = 2)What is a black hole? = = Black holes are areas of intense gravitational pressure. = = = = 3) Does the universe continue to expand? After its initial appearance, it apparently inflated (the "Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. 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 there was no explosion; there was (and continues to be) an expansion. 5) What light elements seem to support the Big Bang Theory? Another misconception is that we tend to image the singularity as a little fireball appearing somewhere in space. According to the many experts however, space didn't exist prior to the Big Bang. = = = = Part 2 = = 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].[|[1]][|[2]][|[3]] It was introduced by [|Pope Gregory XIII], after whom the calendar was named, by a decree signed on 24 February [|1582], a [|papal bull] known by its opening words [|Inter gravissimas].[|[4]] The reformed calendar was adopted later that year by a handful of countries, with other countries adopting it over the following centuries. The motivation for the Gregorian reform was that the [|Julian calendar] assumes that the time between vernal equinoxes is 365.25 days, when in fact it is about 11 minutes less. The accumulated error between these values was about 10 days when the reform was made, resulting in the equinox occurring on March 11 and moving steadily earlier in the calendar. Since the equinox was tied to the celebration of Easter, the Roman Catholic Church considered that this steady movement was undesirable. = = = = 2) What is a leap year? = = A leap year is a year that has one extra year. 3) List three other types of calendars used and how they set up their calendar (ex. Lunar). First one is the Muslim calendar it is used in Islamic countries, most of them are in or near Earths torrid zone. Thats where seasonal variation of climate is slight or doesnt exist and the climate is usually hot. The second type is a luni-solar calendar, it is 12 months long, but a 13th month is inserted every few years to keep the calendar in phase with seasons. The third type is the solar calendar, which is based on the length of the year. The calendar we use today is a solar calendar and it evolved from the ancient Roman calendar which passed through the stage of being a luni-solar calendar.First one is the Muslim calendar it is used in Islamic countries, most of them are in or near Earths torrid zone. Thats where seasonal variation of climate is slight or doesnt exist and the climate is usually hot. The second type is a luni-solar calendar, it is 12 months long, but a 13th month is inserted every few years to keep the calendar in phase with seasons. The third type is the solar calendar, which is based on the length of the year. The calendar we use today is a solar calendar and it evolved from the ancient Roman calendar which passed through the stage of being a luni-solar calendar.

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 8) What is MYA? = =Million Years ago

9) According to the timeline site how many periods of when are there and list time Bing bang-14000. FORMATION OF EARTH  -[|4600 MYA]. CAMBRIAN : Explosion of Life on Earth-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|543 MYA]]] - 490 MYA.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|PERMIAN : Largest Mass Extinction]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|290 MYA]]] - 248 MYA.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|MESOZOIC : Age of Dinosaurs]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|245 MYA]]] - 65 MYA.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|STONE AGE : The Human Era]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|5 MYA]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|2500 BC]]].[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|ICE AGE : Extintion of Large Mammals]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|70000 BC]]] - 8000 BC.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|NEOLITHIC : First Permanent Settlements]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|9000 BC]]] - 4500 BC.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|BRONZE AGE : First Pharaos]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|3200 BC]]] - 1200 BC.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|IRON AGE : Start of the Trojan War]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1200 BC]]] - 332 BC.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|HELLENISTIC PERIOD]]]- [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|332 BC]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|63 BC.]]] [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|ROMAN PERIOD]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|63 BC]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|476]]].[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|BYZANTINE PERIOD]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|330]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1453]]].[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|MIDDLE AGES]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|476]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1350]]].[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|RENAISSANCE]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1350]]] - 1600.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|REFORMATION]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1500]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1600]]].[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|ENLIGHTENMENT]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1600]]] - 1800.[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|INDUSTRIAL REVOLUTION]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1750]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1900.]]][[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|20th CENTURY]]]- [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|1900]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|2000.]]][[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|21st CENTURY]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|2000]]] - [[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|2099.]]][[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|FUTURE]]]-[[@http://www.timelineindex.com/content/clickout.php?siteid=1823|[|2009]]](i think it means 2099 but the website said so)

= 10) What is an eon, epoch, era, and age? An eron is one billion years  ,epoch is a particular period of history,eras denote longer spans of time,an age is a period in the history of the earth, usually shorter than an epoch. = = 11) List three ancient calendars -Celestial bodies-the Sun, Moon, planets, and stars. = = -Scratched lines and gouged holes in sticks and bones, possibly counting the days between phases of the moon

12) List two ancient clocks and how they worked. -Egyptian shadow clock or sundial. This device divided a sunlit day into 10 parts plus two "twilight hours" in the morning and evening. When the long stem with 5 variably spaced marks was oriented east and west in the morning, an elevated crossbar on the east end cast a moving shadow over the marks. At noon, the device was turned in the opposite direction to measure the afternoon "hours."  -Water clocks were among the earliest timekeepers that didn't depend on the observation of celestial bodies. One of the oldest was found in the tomb of the Egyptian pharaoh Amenhotep I, buried around 1500 BCE. Later named clepsydras ("water thieves") by the Greeks, who began using them about 325 BCE, these were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. = = = = 13) What was a revolution of timekeeping? = = A macanical clock = = 14) What all allows for standard more accurate clocks? A atomic clock = = 15) What are time zones? Time Zones are a geographical world globe division of 15o each, starting at Greenwich, in England, created to help people know what time is it now in another part of 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. It passes through Greenwich, England. 17) If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii? 12pm(lunch),5pm,8pm,1am(next day),6am = = 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 we don't use it in Saskatchewan 19) Is there a year zero? no = = 20) Are we starting a new decade in 2010 or 2011? 2011 = = 21) What is linear time? Linear time is a concept where by time is seen sequentially, as a series of events that are leading toward something: beginning, and an end. = = 22) What is cyclical time? Circular time sees time as circular, not necessarily leading towards something, but repeating itself in a cycle of events. =