Time


 * Big Bang Theory Assignment**

Go to [] and answers these questions: 1) About how long ago did the big bang take place? 2) What is a black hole? 3) Does the universe continue to expand? 4) Was there really a big bang? 5) What light elements seem to support the Big Bang Theory? **Answers:** 1)The big bang took place around 13.7 billion years ago. 2)Black holes are areas of intense gravitational pressure. 3)Yes, the universe continues to expand. 4)Big Bang is just the most popular theory, people need to be aware that there is a range of models that could explain the observations. 5)Hydrogen and Helium found in the observable universe are thought to support the Big Bang Theory.
 * Part 1**

Before we start to make our way through history, we need to get an understanding of time and how humans keep track of events that have happened throughout time. Read, watch, and listen to the following websites and answer the questions below. Once you finish this document post it in you Time section of your wiki and e-mail me your answers. Will be tested on the information below at a later date. Enjoy your time! 1) What is the current calendar most of the world uses / accepts? Explain who made it and why this is accepted. 2) What is a leap year? 3) List three other types of calendars used and how they set up their calendar (ex. Lunar). 4) What is BC? 5) What is BCE? 6) What is AD? 7) What is CE? 8) What is MYA? 9) According to the timeline site how many periods of when are there and list time. 10) What is an eon, epoch, era, and age? 11) List three ancient calendars 12) List two ancient clocks and how they worked. 13) What was a revolution of timekeeping? 14) What allows for standard more accurate clocks? 15) What are time zones? 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? 18) What is Daylight Saving Time? Do we use this in Saskatchewan? 19) Is there a year zero? 20) Are we starting a new decade in 2010 or 2011? 21) What is linear time? 22) What is cyclical time?
 * Time Keeps On Slippin’**

1)The Gregorian calendar is the most internationaly accepted calendar**.** It was introduced by Pope Gregory XII 2)Leap year is a year that contains 366 days, with February 29 as an additional day: occurring in years whose last two digits are evenly divisible by four, except for centenary years not divisible by 400. 3)Purely Lunar Calendars- A calendar based on the natural cycles of the moon. Purely Solar Calendars- A calendar based on the cycle of the seasons Lunisolar Calendars- These calendars aim to be both solar calendars and lunar calendars, but are more successful in tracking the seasonal cycle than the lunar cycle. 4)Before Christ 5)Before Common Era 6)Anno Domini 7)Common Era 8)Million Years Ago 9)There are 21 periods, [|14000 MYA] [|Big Bang], [|4600 MYA] [|Formation Earth], [|543 MYA] - 490 MYA[|Cambrian], [|245 MYA] - [|65 MYA] [|[[http://www.timelineindex.com/content/select/165|Mesozoic]]][|,][|[[http://www.timelineindex.com/content/search.php?s=+5MYA|5 MYA]]][| - 2500 BC][|[[http://www.timelineindex.com/content/select/1565|4th Millennium BC]]][|,][|[[http://www.timelineindex.com/content/search.php?s=+70000BC|70000 BC]]][| - 8000 BC I][|[[http://www.timelineindex.com/content/select/478|ce Age]]] [|[[http://www.timelineindex.com/content/search.php?s=+9000BC|9000 BC]]][| - 4500 BC] [|[[http://www.timelineindex.com/content/select/360|First Settlements], [|3200 BC] - [|1200 BC] [|3rd Millennium BC], [|1200 BC] - 332 BC [|2nd Millennium BC], [|332 BC] - 63 BC [|4th Century BC], [|63 BC] - 476 [|1st Century BC], [|330] - [|1453] [|Byzantine], [|476] - 1350 [|Middle Ages], [|1350] - 1600 [|Renaissance], [|1500] - 1600 [|Reformation], [|1600] - 1800 [|Enlightenment], [|1750] - [|1900] [|Industrial Age], [|1900] - 2000 [|20th Century], [|2000] - 2099 [|21st Century], [|2009] [|Future]]] 10)Geologic time units 11)Celestial bodies — 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.
 * Answers:**

Babylonians (in today's Iraq) used a year of 12 alternating 29 day and 30 day lunar months, giving a 354 day year. In contrast, the Mayans of Central America relied not only on the Sun and Moon, but also the planet Venus, to establish 260 day and 365 day calendars. This 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. 12)Sun Clocks- Their moving shadows formed a kind of sundial, enabling people to partition the day into morning and afternoon. Water clocks- These were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. Other clepsydras 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.  13)In Europe during most of the Middle Ages (roughly 500 CE to 1500 CE), technological advancement virtually ceased. Sundial styles evolved, but didn't move far from ancient Egyptian principles. 14)We 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. 15)A time zone is a region on Earth, more or less bounded by lines of longtitude, that has a uniform, legally mandated standard time, usually referred to as the local time. 16)The **Prime Meridian** is the meridian at which the longitude is defined to be 0°. 17)Toronto: 12:00pm London: 12:00 pm Moscow: 8:00 pm Tokyo 1:00 am Hawaii 6:00 am 18)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. 19)"**Year zero**" does not exist in the widely used [|Gregorian calendar] or in its predecessor, the [|Julian calendar] 20) 2011 21) **Linear time** is a concept where by **time** is seen sequentially, as a series of events that are leading toward something 22) Today, as per modern understanding it is considered that the **time** progresses in a linear manner. There are many theories, which explain the nature, origin, its end and other matters related to the **Time**

Geological Time Activities
Part 1 - Q & A

Go to this link []

Find the answers to these questions and post to wiki and e-mail answers

1) What happened at 12 AM January 1, 2004? 2) What happened at 4:41 PM February, 25 2004? 3) How long of actual time happened between the event in question one and two? 4) What happen at 3:39 PM September 3, 2004? 5) What happened at 7:40 PM November 21, 2004? 6) What happened at 1:27PM December 2, 2004? 7) What happened at 12:09 PM December 12, 2004? 8) What happened at 8:37 PM December 13, 2004? 9) What happened at 7:52 PM December 26, 2004? 10) What happened at 5:18 PM December 31, 2004? 11) What happened at 11:48 PM December 31, 2004? 12) What happened at 12:00 AM January 1, 2005? 13) How long of actual time happened between the event in question 11 and 12? 14) How old is the Earth? 15) On the chart how many years are represented by one second.

Answers:

1)Earth formed from planetary nebula. 2)Inferred origin of life (first cells) 3)7 000 000 000 years 4)First multi-celled organisms (seaweed and algae) 5)Ordovician system begins 6)First sharks 7) End of Paleozoic, 96% of all life on Earth perishes 8)First dinosaurs (Eoraptor and Saltoposuchus) 9)End of Mesozoic, probably meteor or comet impact 10) Oldest human like ancestors (hominids) 11) First modern man, Homo sapiens 12) World War II 13)937, 000 years 14) The scale of geologic time is vast, currently estimated at nearly 4.6 billion years. 15)146 years