Time

__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. Gregorian calendar, It was introduced by Pope Gregory XIIl 2) What is a leap year? Every year that is divisible by four is a leap year. 3) List three other types of calendars used and how they set up their calendar (ex. Lunar). Julian Calender, Celestial bodies, 4) What is BC? Before Christ 5) What is BCE? Before Common Era 6) What is AD? Anno Domini 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. Big Bang • Bronze Age • Byzantine • Cambrian • Enlightenment • First Settlements • Formation Earth • Hellenistic Age • Ice Age• Industrial Age • Iron Age • Mesozoic • Middle Ages • Permian • Reformation • Renaissance • Roman Age • Stone Age • Future 10) What is an eon, epoch, era, and age? Eon-the longest division of geological time Epoch-Moment of theoretical suspension of disbelief Era-a major division of geological time; an era is usually divided into two or more periods Age- how long something has existed 11) List three ancient calendars Julian Calender, Mayan Calender, Roman calender. 12) List two ancient clocks and how they worked. Sun Clock, Their moving shadows formed a kind of sundial, enabling people to partition the day into morning and afternoon. Water Clock, were cylindrical or bowl-shaped containers 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. Shadow Clock. 13) What was a revolution of timekeeping? Then, in the first half of the 14th century, large mechanical clocks began to appear in the towers of several large Italian cities. They have no evidence or record of the working models preceding these public clocks, which were weight-driven and regulated by a verge-and-foliot escapement 14) What allows for standard more accurate clocks? 15) What are time zones? A time zone is a region of the earth that has uniform standard time, usually referred to as the local time. 16) What is the prime meridian? A longitude line, measured at 0º, it is the reference point for all other longitude lines 17) If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii?   18) What is Daylight Saving Time? Do we use this in Saskatchewan? daylight-saving time: time during which clocks are set one hour ahead of local standard time; widely adopted during summer to provide extra daylight in the evenings. No,we don't use it. 19) Is there a year zero? "**Year zero**" does not exist in the widely used [|Gregorian calendar] or in its predecessor, the [|Julian calendar]. 20) Are we starting a new decade in 2010 or 2011? Yes. 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? Past,Present,future? __**Geological Time Activities**__ 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 hundred years. 4) What happen at 3:39 PM September 3, 2004? First multi-celled organisms (seaweed and algae) 5) What happened at 7:40 PM November 21, 2004? Burgess Shale organisms: first animals with a  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? 59 years. 14) How old is the Earth? 4.6 billion years old. 15) On the chart how many years are represented by one second. 1 second equals about 146 years.