Daylight Measuring

Total Page：16

File Type：pdf, Size：1020Kb

Daylight Measuring Before clocks, there were sundials. Sundials use a stick or rod to measure the movement of the sun through the day to tell the time. However, fall, or Autumn, is a season of change. Animals migrate, leaves fall and the days change. As the Northern Hemisphere, or top half of the earth, begins to shift to winter, the days grow colder, but also shorter. Considering this, how accurate are sundials? Let us find out. Know before you begin • This activity can be done inside or outside • All supplies are easy to find • Adult supervision is recommended • Please choose a safe space for this activity Materials • Printer • Thick paper like card stock-tape the template to a piece of thin cardboard or a manilla envelope if thick paper is not available • Scissors • Protractor • Glue stick or tape • A space that receives full sun all day • A compass or a cell phone with a compass app Instructions • Print out the attached template and follow the instructions printed on the page. If you can’t print the page, trace it using a protractor to get the correct angle for the dial. • Place your sundial on a flat, stable surface outside that will not get wet. • Orient the tip of the sundial’s needle toward north. • Observe if the time is correct. Continue to check on your sundial each day or week to see if it gives the correct time. Reference: https://sdo.gsfc.nasa.gov/assets/docs/Solar_Clock.pdf I Tell Only Sunny Hours 12 10 11 1 2 9 3 8 4 7 5 ✁ 6 6✁ Cut off half sheet Fold on this line Fold on this line After folding along middle, ✁ cut double thickness along ✁ curved line. ✁ Then fold along broken lines Discard Discard of page Cut to bottom to Cut.

Copy Link

Recommended publications

Chapter 8: Geologic Time
Chapter 8: Geologic Time 1. The Art of Time 2. The History of Relative Time 3. Geologic Time 4. Numerical Time 5. Rates of Change Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Geologic Time How long has this landscape looked like this? How can you tell? Will your grandchildren see this if they hike here in 80 years? The Good Earth/Chapter 8: Geologic Time The Art of Time How would you create a piece of art to illustrate the passage of time? How do you think the Earth itself illustrates the passage of time? What time scale is illustrated in the example above? How well does this relate to geological time/geological forces? The Good Earth/Chapter 8: Geologic Time Go back to the Table of Contents Go to the next section: The History of (Relative) Time The Good Earth/Chapter 8: Geologic Time The History of (Relative) Time Paradigm shift: 17th century – science was a baby and geology as a discipline did not exist. Today, hypothesis testing method supports a geologic (scientific) age for the earth as opposed to a biblical age. Structures such as the oldest Egyptian pyramids (2650-2150 B.C.) and the Great Wall of China (688 B.C.) fall within a historical timeline that humans can relate to, while geological events may seem to have happened before time existed! The Good Earth/Chapter 8: Geologic Time The History of (Relative) Time • Relative Time = which A came first, second… − Grand Canyon – B excellent model − Which do you think happened first – the The Grand Canyon – rock layers record thousands of millions of years of geologic history.
[Show full text]
Tennessee Hunting Seasons Summary 2021-22
2021-22 Tennessee Hunting Seasons Summary Please refer to the Tennessee Hunting and Trapping Guide for detailed hunting dates, bag limits, zones, units, and required licenses and/or permits. G = Gun • M = Muzzleloader • A = Archery • S = Shotgun DEER SPRING TURKEY Statewide bag limit: 2 antlered deer. No more than 1 per day. See the Tennes- S/A Young Sportsman (ages 6-16) Mar. 26-27, 2022* see Hunting and Trapping Guide for deer units and county listings. Daily bag: 1 bearded turkey per day. Counts toward spring A Aug. 27-29 Units A, B, C, D, L season bag of three (3). Private land, antlered deer only. S/A General Season April 2 - May 15, 2022* G/M/A Aug. 27-29 Unit CWD Bag limit: 3 bearded turkeys, no more than 1 per day. Antlered deer only. Private lands and select public lands (see hunting guide). *Some west and southern middle Tennessee counties have shortened seasons A Sep. 25-Oct. 29, Nov. 1-5 Statewide and reduced bag limits. See the Tennessee Hunting and Trapping Guide for Antlerless bag: Units A, B, C, D=4; Units L, CWD=3/day, no more information. season limit G/M/A Oct. 30 - Oct. 31, Jan. 8-9, 2022 Statewide GAME BIRDS Young Sportsman (ages 6-16). Antlerless bag: Units A, B, C, D=2; Units L, CWD=3/day Grouse Oct. 9- Feb. 28, 2022: Daily bag 3 M/A Nov. 6-19 Units A, B, C, D, L Quail Nov. 6 - Feb. 28, 2022: Daily bag 6 Antlerless bag: Units A, B=2; Units C, D=1; Unit L=3/day G/M/A Nov.
[Show full text]
How Does Solar Altitude, Diameter, and Day Length Change Daily and Throughout the Year?
How does solar altitude, diameter, and day length change daily and throughout the year? Let’s prove distance doesn’t matter in seasons by investigating SOLAR ALTITUDE, DAY LENGTH and SOLAR DISTANCE… Would the sun have the same appearance if you observed it from other planets? Why do we see the sun at different altitudes throughout the day? We use the altitude of the sun at a time called solar “noon” because of daily solar altitude changes from the horizon at sunrise and sunset to it’s maximum daily altitude at noon. If you think solar noon is at 12:00:00, you’re mistaken! Solar “noon” doesn’t usually happen at clock-noon at your longitude for lots of reasons! SOLAR INTENSITY and ALTITUDE - Maybe a FLASHLIGHT will help us see this relationship! Draw the beam shape for 3 solar altitudes in your notebooks! How would knowing solar altitude daily and seasonally help make solar panels (collectors)work best? Where would the sun have to be located to capture the maximum amount of sunlight energy? Draw the sun in the right position to maximize the light it receives on panel For the northern hemisphere, in which general direction would they be pointed? For the southern hemisphere, in which direction would they be pointed? SOLAR PANELS at different ANGLES ON GROUND How do shadows show us solar altitude? You used a FLASHLIGHT and MODELING CLAY to show you how SOLAR INTENSITY, ALTITUDE, and SHADOW LENGTH are related! Using at least three solar altitudes and locations, draw your conceptual model of this relationship in your notebooks… Label: Sun compass direction Shadow compass direction Solar altitude Shadow length (long/short) Sun intensity What did the lab show us about how SOLAR ALTITUDE, DIAMETER, & DAY LENGTH relate to each other? YOUR GRAPHS are PROBABLY the easiest way to SEE the RELATIONSHIPS.
[Show full text]
Physics: Sundial Science
Physics: Sundial Science MAIN IDEA Discover how the sun and its shadow is used to tell time by creating a sundial – an instrument that tracks the position of the sun to indicate time of day. SCIENCE BACKGROUND For centuries humans, have utilized the power of the sun as a light source, to grow food, and to tell time. Ancient civilizations used the sun to understand basic astronomy. By tracking the height of the sun in the sky, these civilizations developed calendars for the year and were able to identify harvesting and planting seasons (fall and spring equinoxes) all by tracking the movement of the sun. This also helped certain civilizations find the Equator, an imaginary circle around the Earth that divides it into two halves, the northern and southern hemisphere. By tracking the sun’s apparent position through the creation of sundials, these ancient civilizations were able to divide the day into morning and afternoon. A sundial is a device used to track time by marking a shadow on its surface as the sun moves. Light travels as a wave, similar to waves in the ocean. Shadows occur when this light wave is blocked by an object, creating a dark silhouette of that object on nearby surfaces as light continues to travel all around the object. Based on where the light source is, and the object that is blocking it, the shadow will look different. This is why for a sundial, the shadow will change throughout the day and even more noticeably throughout the year for the same time of day.
[Show full text]
Developing a Critical Horology to Rethink the Potential of Clock Time’ in New Formations (Special Issue: Timing Transformations)
This is the final accepted version of this article. Bastian, M. (forthcoming) ‘Liberating clocks: developing a critical horology to rethink the potential of clock time’ in New Formations (Special Issue: Timing Transformations). Liberating clocks: developing a critical horology to rethink the potential of clock time Michelle Bastian [email protected] Introduction When trying to imagine a new time, a transformed time, a way of living time that is inclusive, sustainable or socially-just – a liberatory time – it is unlikely that a clock will spring to mind. If anything, the clock has become the symbol of all that 1 has gone wrong with our relationship to time. This general mistrust of the clock is well-captured by literary theorist Jesse Matz who observes: Clock time was the false metric against which Henri Bergson and others defined the truth of human time. Modernists made clocks the target of their iconoclasm, staging clocks’ destruction (smashing watches, like Quentin in The Sound and the Fury [1929]) or (like Dali) just melting away, and cultural theorists before and after Foucault have founded cultural critique on the premise that clock time destroys humanity.1 Thus, across a wide range of cultural forms, including philosophy, cultural theory, literature and art, the figure of the clock has drawn suspicion, censure and outright hostility. When we compare this to attitudes towards maps however – which are often thought of as spatial counterparts to clocks – we find a remarkably differently picture. While maps have 1 Jesse Matz, 'How to Do Time with Texts', American Literary History, 21, 4 (2009), 836-44, quotation p836.
[Show full text]
SUNDIALS \0> E O> Contents Page
REG: HER DEPARTMENT OF COMMERCE Letter 1 1-3 BUREAU OF STANDARDS Circular WASHINGTON LC 3^7 (October Jl., 1932) Prepared by R. E. Gould, Chief, Time Section ^ . fA SUNDIALS \0> e o> Contents Page I. Introduction „ 2 II. Corrections to be applied 2 1. Equation of time 3 III. Construction 4 1. Materials and foundation 4 2. Graphical construction for a horizontal sundial 4 3. Gnomon . 5 4. Mathematical construction ........ 6 5,. Illustrations Fig. 1. Layout of a dial 7 Fig. 2. Suggested forms g IV. Setting up the dial 9 V. Mottoes q VI. Bibliography -10 . , 2 I. Introduction One of the earliest methods of determining time was by observing the position of the shadow cast by an object placed in the sunshine. As the day advances the shadow changes and its position at any instant gives an indication of the time. The relative length of the shadow at midday can also be used to indicate the season of the year. It is thought that one of the purposes of the great pyramids of Egypt was to indicate the time of day and the progress of the seasons. Although the origin of the sundial is very obscure, it is known to have been used in very early times in ancient Babylonia. One of the earliest recorded is the Dial of Ahaz 0th Century, B. C. mentioned in the Bible, II Kings XX: 0-11. , The Greeks used sundials in the 4th Century B. C. and one was set up in Rome in 233 B. C. Today sundials are used largely for decorative purposes in gardens or on lawns, and many inquiries have reached the Bureau of Standards regarding the construction and erection of such dials.
[Show full text]
Solar Panels and Optimization Introduction
Solar Panels and Optimization Due Thu, Nov. 2 2017 Image of the Sun. The image was taken from the astrophysics department at Stanford University. Introduction In this lab you will analyze how the efficiency of a solar panel depends on the season and its orientation. The solar radiation falling on a tilted plane (such as a solar panel) depends on numerous factors: the orientation of the plane, the time of the day, the season, the weather, etc. In the next few sections you will learn more about how this affects the power we can receive from solar panels. Figure 1: Sketch shows the Earth orbiting the Sun and the position of the Earth during different seasons. Figure 2: The angle s at the equator. The angle s is measured between the sun ray and the plane of the equator at noon. This implies that at summer solstice s = 23◦, at winter solstice s = −23◦ and the vernal/autumnal equinox s = 0◦. The Earth and the Sun The Earth's orbit about the Sun is almost circular so for this lab we will assume that the distance to the Sun is constant. However, the axis of the Earth is tilted relative to the plane in which the Earth moves around the Sun. The angle between the axis and a normal to this plane is roughly 23◦. As indicated in Figure 1, the north pole points away from the Sun during the northern hemisphere winter, and points toward the Sun during the northern hemisphere summer. Now let us imagine that we stand on the equator.
[Show full text]
Special Commission on Commonwealth's Time Zone Report
Report of the Special Commission on the Commonwealth’s Time Zone November 1, 2017 1 Contents Executive Summary ...................................................................................................3 Purpose of the Commission .......................................................................................6 Structure of the Commission .....................................................................................6 Background ................................................................................................................8 Findings ....................................................................................................................12 Economic Development: Commerce and Trade ...................................................12 Labor and Workforce ............................................................................................14 Public Health .........................................................................................................15 Energy ...................................................................................................................16 Crime and Criminal Justice...................................................................................18 Transportation .......................................................................................................19 Broadcasting .........................................................................................................20 Education and School Start-Times .......................................................................21
[Show full text]
HUNTING and TRAPPING REGULATIONS Teal (Early Season) 5-20 Sep 2020 (All Zones) 6 18
Waterfowl Dates and Information 2020-2021 Illinois Digest of SPECIES DATES (INCLUSIVE) AND ZONES HOURS DAILY LIMIT POSSESSION LIMIT HUNTING AND TRAPPING REGULATIONS Teal (early season) 5-20 Sep 2020 (all zones) 6 18 Rail (Sora and Virginia only) 5 Sep - 13 Nov 2020 (all zones) Sunrise to Sunset 25 75 Deer & Turkey Season Dates and Limits Snipe (Wilson’s snipe) 5 Sep - 20 Dec 2020 (all zones) 8 24 SEASON DATES (INCLUSIVE) HOURS LIMIT 17 Oct - 15 Dec 2020 (North) Archery Deer (Counties with a firearm 1 Oct–19 Nov and 23 Nov–2 Dec and 7 Dec 2020–17 Jan 2021 One deer per archery permit 24 Oct - 22 Dec 2020 (Central) season and west of Route 47 in Kane County) Ducks (but see Scaup below) 6 18 Archery Deer (Cook, DuPage, Lake 14 Nov 2020 - 12 Jan 2021 (South-central) 1 Oct 2020–17 Jan 2021 One deer per archery permit 26 Nov 2020 - 24 Jan 2021 (South) and Kane [east of route 47] Counties) Firearm Deer 20-22 Nov and Mergansers Same as ducks 5 15 One deer per firearm permit (Shotgun, Muzzleloader, Handgun) 3-6 Dec 2020 1/2 hour Coots Same as ducks 15 45 before sunrise Muzzleloader-only Deer 11-13 Dec 2020 17 Oct - 30 Nov and 1 - 15 Dec (North) First Segment: First Segment: to 1/2 hour One deer per muzzleloader permit after sunset 24 Oct - 7 Dec and 8 - 22 Dec (Central) 2/day 6 31 Dec 2020–3 Jan 2021 and Scaup (Bluebills) Special CWD Deer One deer per valid permit 14 Nov - 28 Dec and 29 Dec - 12 Jan 2021 (SC) Second Segment: Second Segment: 15-17 Jan 2021 26 Nov - 9 Jan 2021 and 10 - 24 Jan (South) 1/day 3 Late Winter Antlerless-only Deer 31 Dec 2020–3 Jan 2021 and One antlerless deer per permit 1-15 Sep 2020 (North and Central) 5 15 (Shotgun, Muzzleloader, Handgun) 15-17 Jan 2021 Canada Geese (early season) 1-15 Sep 2020 (South-central and South) 2 6 Youth Firearm Deer 10-12 Oct 2020 One deer 1/2 hour before 17 Oct 2020 - 14 Jan 2021 (North) 1/2 hour before One tom, jake or bearded hen per permit, sunrise to sunset Youth Turkey (1 permit per year) 27-28 Mar and 3-4 Apr 2021 24 Oct - 1 Nov 2020 and sunrise to 1 p.m.
[Show full text]
Duck Hunters Will Have 45-Day Season This Year -- July , 1938
INFORMA’FION FOR THE If’RESS United States Department of Agriculture . Release - Immediate USHINGTON, D, c., July 18, 193s DUCK HUNTERSWILL HAVE b+DAY SmSON THIS YEZR Bird Iacrcascs Lead to Liberalized Regulations after 3 Years of 30-Cay Hunting After thrco years of 30-day open seasons and stringent regulations, duck huniters will have 45 days this year in each of the three zones under rules that als, have changed the possession limit from one day's bag to two and legalized the taking of a fen ducks fully protected the last tno years* New amendments to the regulationsunder the Federal Migratory Bird Treaty Act have been approved by President Roosevelt after being adopted by Secretary Nallacc. The changes are based on investigations of waterfowl conditions made by the Bureau of Biological Survey in this country, Canada, and Mexico. In the northern zone the season on ducks, geese, Wilsonls snipe or jack- snipe, and coot epcns October 1 and closes November 14, In the intermediate zone the season $s October 15 to November 28, and in the southern zone, November 15 to December 29. Dates arc inclusive. States in tho northorn zone include Maine, Michigan, Minnesota, New Hampshirq North Dtlkota, South Wota, Vermont, and Wisconsin. In the intcrmedizto zone arc California, Colorado, Connecticut, Delaware, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Massachusetts, Missouri, Montana, Nebraska, Nevadir, New Jers,q, Ncn York including Long Island, Ohio, Oklahoma, Ore@% Pennsylvania, Rhode Island, Utah, 7fashington, West Virginia ‘and Wyoming. Tho southern zone includes Alabama, Arizona, Arkansas, Florida, Georgia, Louisiana, Maryland, Mississippi, Nerr Mexico, North Carolina, South Carolina, 91-39 -2- Tennessee, Texas, and Virginia.
[Show full text]
Time Before Clocks: Solar Time Gnomon Background: Before Clocks and Watches Were Invented, People Used the Rhythms of Nature As Signals of the Passage of Time
Time Before Clocks: Solar Time gnomon Background: Before clocks and watches were invented, people used the rhythms of nature as signals of the passage of time. Activities were planned around the rising and setting of the sun, the cycle of the moon, and the changing of the seasons. The sundial dates back to around 1500 B.C.E. in Egypt and was also used in Ancient Greece and Rome. Sundials enabled people to tell the time of the day by showing the position and length of a shadow. The sun shines on a centerpiece called a gnomon (pronounced no- mon). The shadow of the gnomon moves around the face of the sundial, thus giving the hour of the day. Telling time by sunlight meant that the length of the hour changed according to the season. The hours would be longer during the summer and shorter in the winter. This timepiece also had a big disadvantage because of its reliance on the sun shining brightly enough to cast a visible shadow. In this activity participants create their own sundial. Materials: Simple sundial pattern sheet Scissors Glue or scotch tape Compass Sundial Instructions for Activity: 1. Use the sundial included in the kit as a demonstration object to show participants what a sundial looks like and how it works before participants create their own. 2. Cut out the dial plate and the gnomon (pronounced no-mon) patterns. 3. Cut a slit into the dial plate along the dotted line. 4. Fold along the lines of the gnomon as marked on the pattern.
[Show full text]
Monsoons: Global Energetics and Local Physics As Drivers of Past, Present and Future Monsoons
Monsoons: global energetics and local physics as drivers of past, present and future monsoons Article Accepted Version Biasutti, M., Voigt, A., Boos, W. R., Braconnot, P., Hargreaves, J. C., Harrison, S. P., Kang, S. M., Mapes, B. E., Scheff, J., Schumacher, C., Sobel, A. H. and Xie, S.-P. (2018) Monsoons: global energetics and local physics as drivers of past, present and future monsoons. Nature Geoscience, 11 (6). pp. 392-400. ISSN 1752-0894 doi: https://doi.org/10.1038/s41561-018-0137-1 Available at http://centaur.reading.ac.uk/76799/ It is advisable to refer to the publisher's version if you intend to cite from the work. See Guidance on citing . To link to this article DOI: http://dx.doi.org/10.1038/s41561-018-0137-1 Publisher: Nature Publishing Group All outputs in CentAUR are protected by Intellectual Property Rights law, including copyright law. Copyright and IPR is retained by the creators or other copyright holders. Terms and conditions for use of this material are defined in the End User Agreement . www.reading.ac.uk/centaur CentAUR Central Archive at the University of Reading Reading's research outputs online 1 Monsoons: global energetics and local physics 1 2;1 3 4 5 2 Michela Biasutti , Aiko Voigt , William R. Boos , Pascale Braconnot , Julia C. Hargreaves , 6 7 8 9 10 3 Sandy P. Harrison , Sarah M. Kang , Brian E. Mapes , Jacob Scheff , Courtney Schumacher , 1;11 12 4 Adam H. Sobel , & Shang-Ping Xie 1 5 Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA 2 6 Institute of Meteorology and Climate
[Show full text]