time

1) About how long ago did the big bang take place? Around 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? Yes it does.

4) Was there really a big bang? No.

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 slipping__**

1) What is the current calendar most of the world uses / accepts? Explain who made it and why this is accepted. The Gregorian calendar, also known as the Western calendar or Christian calendar, is the internationally accepted civil calendar

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). Gregorian calendar reform contained two parts, a reform of the Julian calendar as used up to Pope Gregory's time, together with a reform of the lunar cycle used by the Church along with the Julian calendar for calculating dates 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? A recent term. It refers to Common Era and is used in place of A.D. the dates are the same ie 2009 AD is 2009 CE.

8) What is MYA? Big bang: Formation of the Universe, Formation of the Earth, Cambrian: Explosion of Life on Earth, Permian: Largest Mass Explosion, Mesozoic: Age of dinosaurs, Cenozoic: Age of mammals

9) According to the timeline site how many periods of when are there and list time. There are 22 periods

10) What is an eon, epoch, era, and age? Era is time period in history. Eon is an age. Epoch is period. Age is a period of animate existence

11) List three ancient calendars Chinese, Indian, Jewish

12) List two ancient clocks and how they worked. -A __water clock__ or clepsydra is any timepiece in which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel where the amount is then measured.

-A __sundial__ works by casting a shadow in different positions, at different times of the day

13) What was a revolution of timekeeping? In Europe during most of the Middle Ages (roughly 500 to 1500 A.D.), technological advancement was at a virtual standstill. Sundial styles evolved, but didn't move far from ancient Egyptian principles.

14) What allows for standard more accurate clocks? An atomic clock is a clock that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.

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 Prime Meridian is the meridian (line of longitude) at which the longitude is defined to be 0°.

17) If it’s 10:00 AM in Regina, what time is it in Toronto? London? Moscow? Tokyo? Hawaii? Toronto- 11 AM Londen- 4 AM Moscow- 8 PM Tokyo- 1 AM Hawaii- 6 AM

18) What is Daylight Saving Time? Do we use this in Saskatchewan? The practice of adjusting clocks to save daylight hours. We don't use it.

19) Is there a year zero? No

20) Are we starting a new decade in 2010 or 2011? 2010 is a start of a new decade.

21) What is linear time? Liner time is often viewed as a desirable attribute for algorithm.Algorithm is a stp by step problem solving procedure, especially an established recursive computational procedure for solving a problem in a finite number of steps.

22) What is cyclical time? Ancient cultures have a concept of a wheel of time, that regards time as cyclical consisting of repeating ages that happen to every being of the Universe between birth and extinction.