Geologic Timeline Objectives
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Geological Timeline
Geological Timeline In this pack you will find information and activities to help your class grasp the concept of geological time, just how old our planet is, and just how young we, as a species, are. Planet Earth is 4,600 million years old. We all know this is very old indeed, but big numbers like this are always difficult to get your head around. The activities in this pack will help your class to make visual representations of the age of the Earth to help them get to grips with the timescales involved. Important EvEnts In thE Earth’s hIstory 4600 mya (million years ago) – Planet Earth formed. Dust left over from the birth of the sun clumped together to form planet Earth. The other planets in our solar system were also formed in this way at about the same time. 4500 mya – Earth’s core and crust formed. Dense metals sank to the centre of the Earth and formed the core, while the outside layer cooled and solidified to form the Earth’s crust. 4400 mya – The Earth’s first oceans formed. Water vapour was released into the Earth’s atmosphere by volcanism. It then cooled, fell back down as rain, and formed the Earth’s first oceans. Some water may also have been brought to Earth by comets and asteroids. 3850 mya – The first life appeared on Earth. It was very simple single-celled organisms. Exactly how life first arose is a mystery. 1500 mya – Oxygen began to accumulate in the Earth’s atmosphere. Oxygen is made by cyanobacteria (blue-green algae) as a product of photosynthesis. -
Work Hours Calendar Work Hours Calendar
Work Hours Calendar Work Hours Calendar EMPLOYEE: DATES (Dates entered in this calendar, e.g., April–July 2016) EMPLOYER: START OF WORKWEEK: PAY: (Sunday / Monday / Tuesday / etc.) (Hourly / Tips / Salary / Piece Rate) Minimum Wage Generally, you must be paid at least the federal minimum wage for all the time that you work, whether you are paid by the hour, the day, or at a piece rate. Overtime & Regular Rate If you are not an exempt employee, you must receive time and one-half your regular rate of pay after 40 hours of work in a seven-day workweek. Regular rate includes most compensation, including non-discretionary bonuses and shift differentials. Misclassification Some employers misclassify workers who are employees under the law as something other than employees, sometimes calling them “independent contractors.” When this happens, the workers do not receive certain workplace rights and benefits, such as the minimum wage and overtime pay, to which they are legally entitled. Recordkeeping Generally, you should know that your employer must keep records of all wages paid to you and of all hours you worked, no matter where the work is done. Similarly, we recommend that you keep your own records of all the hours you work and of your pay. We recommend that you keep all your pay 1 stubs, information your employer gives you or tells you about your pay rate, how many hours you worked, including overtime, and other information on your employer’s pay practices. This work hours calendar should help you keep as much information as possible. Em ployers must pay employees for all the time worked in a workday. -
Geology Timeline
Red Rock Canyon NCA Environmental Education Program Geology Timeline Grades: 3-12 Objective: Demonstrate the relative distance of events in Estimated Time: 15-30 minutes time Standards Met: Procedure: 3-5 grade: Lead in to topic by discussing the age of the o Science E.5.C Students earth and how long students think various things understand that features on the of the surrounding area are. Earth's surface are constantly changed by a combination of Ask a chaperone to hold one end of the yarn to slow and rapid processes. mark the beginning of the earth. Explain that the earth is 4.6 billion years old, and that you’ll be 6-8 grade: doing an activity to get a better understanding of o Science E.8.C Students the age of everything around you. understand that landforms result from a combination of Have the students walk with you to when rocks constructive and destructive first appear on earth, 12 feet from the chaperone, processes. and mark it with tape or yarn. Explain that to 9-12 grade: scale this represents 600 million years and how o Science E.12.C Students geology is measured on a much larger scale that understand evidence for we are used to looking at things. processes that take place on a geological time scale. Note: Depending on your class, it may be helpful to have the measurements pre-marked on the Materials Needed: yarn before doing activity with students. Ball of yarn or twine Method for measuring Continue on as a group to the third point, when Brightly colored tape or contrasting life begins on earth, 16 feet from the chaperone. -
The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars
Heavenly Mathematics: The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars Helmer Aslaksen Department of Mathematics National University of Singapore [email protected] www.math.nus.edu.sg/aslaksen/ www.chinesecalendar.net 1 Public Holidays There are 11 public holidays in Singapore. Three of them are secular. 1. New Year’s Day 2. Labour Day 3. National Day The remaining eight cultural, racial or reli- gious holidays consist of two Chinese, two Muslim, two Indian and two Christian. 2 Cultural, Racial or Religious Holidays 1. Chinese New Year and day after 2. Good Friday 3. Vesak Day 4. Deepavali 5. Christmas Day 6. Hari Raya Puasa 7. Hari Raya Haji Listed in order, except for the Muslim hol- idays, which can occur anytime during the year. Christmas Day falls on a fixed date, but all the others move. 3 A Quick Course in Astronomy The Earth revolves counterclockwise around the Sun in an elliptical orbit. The Earth ro- tates counterclockwise around an axis that is tilted 23.5 degrees. March equinox June December solstice solstice September equinox E E N S N S W W June equi Dec June equi Dec sol sol sol sol Beijing Singapore In the northern hemisphere, the day will be longest at the June solstice and shortest at the December solstice. At the two equinoxes day and night will be equally long. The equi- noxes and solstices are called the seasonal markers. 4 The Year The tropical year (or solar year) is the time from one March equinox to the next. The mean value is 365.2422 days. -
Islamic Calendar from Wikipedia, the Free Encyclopedia
Islamic calendar From Wikipedia, the free encyclopedia -at اﻟﺘﻘﻮﻳﻢ اﻟﻬﺠﺮي :The Islamic, Muslim, or Hijri calendar (Arabic taqwīm al-hijrī) is a lunar calendar consisting of 12 months in a year of 354 or 355 days. It is used (often alongside the Gregorian calendar) to date events in many Muslim countries. It is also used by Muslims to determine the proper days of Islamic holidays and rituals, such as the annual period of fasting and the proper time for the pilgrimage to Mecca. The Islamic calendar employs the Hijri era whose epoch was Islamic Calendar stamp issued at King retrospectively established as the Islamic New Year of AD 622. During Khaled airport (10 Rajab 1428 / 24 July that year, Muhammad and his followers migrated from Mecca to 2007) Yathrib (now Medina) and established the first Muslim community (ummah), an event commemorated as the Hijra. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, "in the year of the Hijra") in parallel with the Christian (AD) and Jewish eras (AM). In Muslim countries, it is also sometimes denoted as H[1] from its Arabic form ( [In English, years prior to the Hijra are reckoned as BH ("Before the Hijra").[2 .(ﻫـ abbreviated , َﺳﻨﺔ ﻫِ ْﺠﺮﻳّﺔ The current Islamic year is 1438 AH. In the Gregorian calendar, 1438 AH runs from approximately 3 October 2016 to 21 September 2017.[3] Contents 1 Months 1.1 Length of months 2 Days of the week 3 History 3.1 Pre-Islamic calendar 3.2 Prohibiting Nasī’ 4 Year numbering 5 Astronomical considerations 6 Theological considerations 7 Astronomical -
Critical Analysis of Article "21 Reasons to Believe the Earth Is Young" by Jeff Miller
1 Critical analysis of article "21 Reasons to Believe the Earth is Young" by Jeff Miller Lorence G. Collins [email protected] Ken Woglemuth [email protected] January 7, 2019 Introduction The article by Dr. Jeff Miller can be accessed at the following link: http://apologeticspress.org/APContent.aspx?category=9&article=5641 and is an article published by Apologetic Press, v. 39, n.1, 2018. The problems start with the Article In Brief in the boxed paragraph, and with the very first sentence. The Bible does not give an age of the Earth of 6,000 to 10,000 years, or even imply − this is added to Scripture by Dr. Miller and other young-Earth creationists. R. C. Sproul was one of evangelicalism's outstanding theologians, and he stated point blank at the Legionier Conference panel discussion that he does not know how old the Earth is, and the Bible does not inform us. When there has been some apparent conflict, either the theologians or the scientists are wrong, because God is the Author of the Bible and His handiwork is in general revelation. In the days of Copernicus and Galileo, the theologians were wrong. Today we do not know of anyone who believes that the Earth is the center of the universe. 2 The last sentence of this "Article In Brief" is boldly false. There is almost no credible evidence from paleontology, geology, astrophysics, or geophysics that refutes deep time. Dr. Miller states: "The age of the Earth, according to naturalists and old- Earth advocates, is 4.5 billion years. -
The Geologic Time Scale Is the Eon
Exploring Geologic Time Poster Illustrated Teacher's Guide #35-1145 Paper #35-1146 Laminated Background Geologic Time Scale Basics The history of the Earth covers a vast expanse of time, so scientists divide it into smaller sections that are associ- ated with particular events that have occurred in the past.The approximate time range of each time span is shown on the poster.The largest time span of the geologic time scale is the eon. It is an indefinitely long period of time that contains at least two eras. Geologic time is divided into two eons.The more ancient eon is called the Precambrian, and the more recent is the Phanerozoic. Each eon is subdivided into smaller spans called eras.The Precambrian eon is divided from most ancient into the Hadean era, Archean era, and Proterozoic era. See Figure 1. Precambrian Eon Proterozoic Era 2500 - 550 million years ago Archaean Era 3800 - 2500 million years ago Hadean Era 4600 - 3800 million years ago Figure 1. Eras of the Precambrian Eon Single-celled and simple multicelled organisms first developed during the Precambrian eon. There are many fos- sils from this time because the sea-dwelling creatures were trapped in sediments and preserved. The Phanerozoic eon is subdivided into three eras – the Paleozoic era, Mesozoic era, and Cenozoic era. An era is often divided into several smaller time spans called periods. For example, the Paleozoic era is divided into the Cambrian, Ordovician, Silurian, Devonian, Carboniferous,and Permian periods. Paleozoic Era Permian Period 300 - 250 million years ago Carboniferous Period 350 - 300 million years ago Devonian Period 400 - 350 million years ago Silurian Period 450 - 400 million years ago Ordovician Period 500 - 450 million years ago Cambrian Period 550 - 500 million years ago Figure 2. -
“Anthropocene” Epoch: Scientific Decision Or Political Statement?
The “Anthropocene” epoch: Scientific decision or political statement? Stanley C. Finney*, Dept. of Geological Sciences, California Official recognition of the concept would invite State University at Long Beach, Long Beach, California 90277, cross-disciplinary science. And it would encourage a mindset USA; and Lucy E. Edwards**, U.S. Geological Survey, Reston, that will be important not only to fully understand the Virginia 20192, USA transformation now occurring but to take action to control it. … Humans may yet ensure that these early years of the ABSTRACT Anthropocene are a geological glitch and not just a prelude The proposal for the “Anthropocene” epoch as a formal unit of to a far more severe disruption. But the first step is to recognize, the geologic time scale has received extensive attention in scien- as the term Anthropocene invites us to do, that we are tific and public media. However, most articles on the in the driver’s seat. (Nature, 2011, p. 254) Anthropocene misrepresent the nature of the units of the International Chronostratigraphic Chart, which is produced by That editorial, as with most articles on the Anthropocene, did the International Commission on Stratigraphy (ICS) and serves as not consider the mission of the International Commission on the basis for the geologic time scale. The stratigraphic record of Stratigraphy (ICS), nor did it present an understanding of the the Anthropocene is minimal, especially with its recently nature of the units of the International Chronostratigraphic Chart proposed beginning in 1945; it is that of a human lifespan, and on which the units of the geologic time scale are based. -
Geologic Timeline
SCIENCE IN THE PARK: GEOLOGY GEOLOGIC TIME SCALE ANALOGY PURPOSE: To show students the order of events and time periods in geologic time and the order of events and ages of the physiographic provinces in Virginia. BACKGROUND: Exact dates for events change as scientists explore geologic time. Dates vary from resource to resource and may not be the same as the dates that appear in your text book. Analogies for geologic time: a 24 hour clock or a yearly calendar. Have students or groups of students come up with their own original analogy. Before you assign this activity, you may want to try it, depending on the age of the student, level of the class, or time constraints, you may want to leave out the events that have a date of less than 1 million years. ! Review conversions in the metric system before you begin this activity ! References L.S. Fichter, 1991 (1997) http://csmres.jmu.edu/geollab/vageol/vahist/images/Vahistry.PDF http://pubs.usgs.gov/gip/geotime/age.html Wicander, Reed. Historical Geology. Fourth Edition. Toronto, Ontario: Brooks/Cole, 2004. Print. VIRGINIA STANDARDS OF LEARNING ES.10 The student will investigate and understand that many aspects of the history and evolution of the Earth can be inferred by studying rocks and fossils. Key concepts include: relative and absolute dating; rocks and fossils from many different geologic periods and epochs are found in Virginia. Developed by C.P. Anderson Page 1 SCIENCE IN THE PARK: GEOLOGY Building a Geologic Time Scale Time: Materials Meter stick, 5 cm adding machine tape, pencil, colored pencils Procedure 1. -
Guide for the Use of the International System of Units (SI)
Guide for the Use of the International System of Units (SI) m kg s cd SI mol K A NIST Special Publication 811 2008 Edition Ambler Thompson and Barry N. Taylor NIST Special Publication 811 2008 Edition Guide for the Use of the International System of Units (SI) Ambler Thompson Technology Services and Barry N. Taylor Physics Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899 (Supersedes NIST Special Publication 811, 1995 Edition, April 1995) March 2008 U.S. Department of Commerce Carlos M. Gutierrez, Secretary National Institute of Standards and Technology James M. Turner, Acting Director National Institute of Standards and Technology Special Publication 811, 2008 Edition (Supersedes NIST Special Publication 811, April 1995 Edition) Natl. Inst. Stand. Technol. Spec. Publ. 811, 2008 Ed., 85 pages (March 2008; 2nd printing November 2008) CODEN: NSPUE3 Note on 2nd printing: This 2nd printing dated November 2008 of NIST SP811 corrects a number of minor typographical errors present in the 1st printing dated March 2008. Guide for the Use of the International System of Units (SI) Preface The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric system of measurement. Long the dominant measurement system used in science, the SI is becoming the dominant measurement system used in international commerce. The Omnibus Trade and Competitiveness Act of August 1988 [Public Law (PL) 100-418] changed the name of the National Bureau of Standards (NBS) to the National Institute of Standards and Technology (NIST) and gave to NIST the added task of helping U.S. -
1St Term Worksheet Subject – Social Studies Class – IV Name : Sec
1 (iv) so.std. 1st Term Worksheet Subject – Social Studies Class – IV Name : Sec. : Chapter – 2 [Calendar and Timeline] [Stop to answer] [A] Name the months of the Gregorian calendar. [21] _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ [New words] BC: ________________________________________________________________________________________ AD: ________________________________________________________________________________________ BCE: _________________________________________________________________________________________ CE: _________________________________________________________________________________________ [Exercises] [A] Write true or false: [22] 1. We need a calendar to organise our lives in a better way. ____________ 2. Saka calendar is also known as the Christian calendar. ____________ 3. The birth year of Jesus was taken as zero. ____________ 4. Saka calendar has 365 days in a leap year. ____________ 5. Gregorian calendar came into use in 1582. ____________ [B] Fill in the blanks: [22] 1. We mark the important _____________________, _____________________ and festivals on a calendar. 2. _____________________ calendar was started by Pope Gregory XIII. 3. _____________________ is the official civil calendar used in India. -
Using Timelines to Teach History
Using Timelines to Teach History The questions of how and why events occurred takes place over time. Timelines can serve as a visual tool for studying periods of history —a day, a year, an era— and help students grasp the nuances of causality and continuity1. Many teachers discuss the struggle to help students care about chronology. A deliberate plotting of events organized around a common theme can spur them into realizing not only how history happened, but how to construct meaning and examine the human experience throughout an historical era. Using timelines in the classroom can also encourage students to see interdisciplinary connections between events occurring in a single period by including the lenses of music, art, science, or literature. It is, in fact, not accidental that a certain poem might be recognized as tragic or triumphant depending on its year of its publication. A painting like Picasso’s Guernica speaks to the tragedy of war by taking into consideration the time of its creation. A record of an event or era can help students have more “ah-ha” moments, and help bring history to life by mapping events onto a cohesive temporal narrative. In this way, timelines can be a highly valuable resource when studying the Holocaust within 20th century history. One of the core pedagogical principles of Echoes & Reflections is the belief that the Holocaust was not inevitable. Using a timeline can underscore this idea, and help students grasp that the Holocaust was a progression of events, decisions, actions, and inactions, any of which might have happened differently if different choices were made.