North American Societies
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North America Other Continents
Arctic Ocean Europe North Asia America Atlantic Ocean Pacific Ocean Africa Pacific Ocean South Indian America Ocean Oceania Southern Ocean Antarctica LAND & WATER • The surface of the Earth is covered by approximately 71% water and 29% land. • It contains 7 continents and 5 oceans. Land Water EARTH’S HEMISPHERES • The planet Earth can be divided into four different sections or hemispheres. The Equator is an imaginary horizontal line (latitude) that divides the earth into the Northern and Southern hemispheres, while the Prime Meridian is the imaginary vertical line (longitude) that divides the earth into the Eastern and Western hemispheres. • North America, Earth’s 3rd largest continent, includes 23 countries. It contains Bermuda, Canada, Mexico, the United States of America, all Caribbean and Central America countries, as well as Greenland, which is the world’s largest island. North West East LOCATION South • The continent of North America is located in both the Northern and Western hemispheres. It is surrounded by the Arctic Ocean in the north, by the Atlantic Ocean in the east, and by the Pacific Ocean in the west. • It measures 24,256,000 sq. km and takes up a little more than 16% of the land on Earth. North America 16% Other Continents 84% • North America has an approximate population of almost 529 million people, which is about 8% of the World’s total population. 92% 8% North America Other Continents • The Atlantic Ocean is the second largest of Earth’s Oceans. It covers about 15% of the Earth’s total surface area and approximately 21% of its water surface area. -
Recent North Magnetic Pole Acceleration Towards Siberia Caused by flux Lobe Elongation
Recent north magnetic pole acceleration towards Siberia caused by flux lobe elongation Philip W. Livermore,1∗, Christopher C. Finlay 2, Matthew Bayliff 1 1School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK, 2DTU Space, Technical University of Denmark, 2800 Kgs. Lyngby, Copenhagen, Denmark ∗To whom correspondence should be addressed; E-mail: [email protected]. Abstract The wandering of Earth’s north magnetic pole, the location where the magnetic field points vertically downwards, has long been a topic of scien- tific fascination. Since the first in-situ measurements in 1831 of its location in the Canadian arctic, the pole has drifted inexorably towards Siberia, ac- celerating between 1990 and 2005 from its historic speed of 0-15 km/yr to its present speed of 50-60 km/yr. In late October 2017 the north magnetic pole crossed the international date line, passing within 390 km of the geo- graphic pole, and is now moving southwards. Here we show that over the last two decades the position of the north magnetic pole has been largely determined by two large-scale lobes of negative magnetic flux on the core- mantle-boundary under Canada and Siberia. Localised modelling shows that elongation of the Canadian lobe, likely caused by an alteration in the pattern of core-flow between 1970 and 1999, significantly weakened its signature on Earth’s surface causing the pole to accelerate towards Siberia. A range of simple models that capture this process indicate that over the next decade arXiv:2010.11033v1 [physics.geo-ph] 21 Oct 2020 the north magnetic pole will continue on its current trajectory travelling a further 390-660 km towards Siberia. -
Struggle for North America Prepare to Read
0120_wh09MODte_ch03s3_s.fm Page 120 Monday, June 4, 2007 10:26WH09MOD_se_CH03_S03_s.fm AM Page 120 Monday, April 9, 2007 10:44 AM Step-by-Step WITNESS HISTORY AUDIO SECTION 3 Instruction 3 A Piece of the Past In 1867, a Canadian farmer of English Objectives descent was cutting logs on his property As you teach this section, keep students with his fourteen-year-old son. As they focused on the following objectives to help used their oxen to pull away a large log, a them answer the Section Focus Question piece of turf came up to reveal a round, and master core content. 3 yellow object. The elaborately engraved 3 object they found, dated 1603, was an ■ Explain why the colony of New France astrolabe that had belonged to French grew slowly. explorer Samuel de Champlain. This ■ Analyze the establishment and growth astrolabe was a piece of the story of the of the English colonies. European exploration of Canada and the A statue of Samuel de Champlain French-British rivalry that followed. ■ Understand why Europeans competed holding up an astrolabe overlooks Focus Question How did European for power in North America and how the Ottawa River in Canada (right). their struggle affected Native Ameri- Champlain’s astrolabe appears struggles for power shape the North cans. above. American continent? Struggle for North America Prepare to Read Objectives In the 1600s, France, the Netherlands, England, and Sweden Build Background Knowledge L3 • Explain why the colony of New France grew joined Spain in settling North America. North America did not Given what they know about the ancient slowly. -
Countries and Continents of the World: a Visual Model
Countries and Continents of the World http://geology.com/world/world-map-clickable.gif By STF Members at The Crossroads School Africa Second largest continent on earth (30,065,000 Sq. Km) Most countries of any other continent Home to The Sahara, the largest desert in the world and The Nile, the longest river in the world The Sahara: covers 4,619,260 km2 The Nile: 6695 kilometers long There are over 1000 languages spoken in Africa http://www.ecdc-cari.org/countries/Africa_Map.gif North America Third largest continent on earth (24,256,000 Sq. Km) Composed of 23 countries Most North Americans speak French, Spanish, and English Only continent that has every kind of climate http://www.freeusandworldmaps.com/html/WorldRegions/WorldRegions.html Asia Largest continent in size and population (44,579,000 Sq. Km) Contains 47 countries Contains the world’s largest country, Russia, and the most populous country, China The Great Wall of China is the only man made structure that can be seen from space Home to Mt. Everest (on the border of Tibet and Nepal), the highest point on earth Mt. Everest is 29,028 ft. (8,848 m) tall http://craigwsmall.wordpress.com/2008/11/10/asia/ Europe Second smallest continent in the world (9,938,000 Sq. Km) Home to the smallest country (Vatican City State) There are no deserts in Europe Contains mineral resources: coal, petroleum, natural gas, copper, lead, and tin http://www.knowledgerush.com/wiki_image/b/bf/Europe-large.png Oceania/Australia Smallest continent on earth (7,687,000 Sq. -
The Diffusion of Maize to the Southwestern United States and Its Impact
PERSPECTIVE The diffusion of maize to the southwestern United States and its impact William L. Merrilla, Robert J. Hardb,1, Jonathan B. Mabryc, Gayle J. Fritzd, Karen R. Adamse, John R. Roneyf, and A. C. MacWilliamsg aDepartment of Anthropology, National Museum of Natural History, Smithsonian Institution, P.O. Box 37102, Washington, DC 20013-7012; bDepartment of Anthropology, One UTSA Circle, University of Texas at San Antonio, San Antonio, TX 78249; cHistoric Preservation Office, City of Tucson, P.O. Box 27210, Tucson, AZ 85726; dDepartment of Anthropology, Campus Box 1114, One Brookings Drive, Washington University, St. Louis, MO 63130; eCrow Canyon Archaeological Center, 23390 Road K, Cortez, CO 81321; fColinas Cultural Resource Consulting, 6100 North 4th Street, Private Mailbox #300, Albuquerque, NM 87107; and gDepartment of Archaeology, 2500 University Drive Northwest, University of Calgary, Calgary, Alberta, Canada T2N 1N4 Edited by Linda S. Cordell, University of Colorado, Boulder, CO, and approved October 30, 2009 (received for review June 22, 2009) Our understanding of the initial period of agriculture in the southwestern United States has been transformed by recent discoveries that establish the presence of maize there by 2100 cal. B.C. (calibrated calendrical years before the Christian era) and document the processes by which it was integrated into local foraging economies. Here we review archaeological, paleoecological, linguistic, and genetic data to evaluate the hypothesis that Proto-Uto-Aztecan (PUA) farmers migrating from a homeland in Mesoamerica intro- duced maize agriculture to the region. We conclude that this hypothesis is untenable and that the available data indicate instead a Great Basin homeland for the PUA, the breakup of this speech community into northern and southern divisions Ϸ6900 cal. -
Map and Compass
UE CG 039-089 2018_UE CG 039-089 2018 2018-08-29 9:57 AM Page 56 MAP The north magnetic pole is not the same as the geographic North Pole, also known as AND COMPASS true north, which is the northern end of the axis around which the earth spins. In fact, the north magnetic pole currently lies Background Information approximately 800 mi (1300 km) south of the geographic North Pole, in northern A compass is an instrument that people use Canada. And because the north magnetic to find a direction in relation to the earth as pole migrates at 6.6 mi (10 km) per year, its a whole. The magnetic needle in the location is constantly changing. compass, which is the freely moving needle in the compass that has a red end, points The meridians of longitude on maps and north. More specifically, this needle points globes are based upon the geographic to the north magnetic pole, the northern North Pole rather than the north magnetic end of the earth’s magnetic field, which pole. This means that magnetic north, the can be imagined as lines of magnetism that direction that a compass indicates as north, leave the south magnetic pole, flow north is not the same direction as maps indicate around the earth, and then enter the north for north. Magnetic declination, the magnetic pole. difference in the angle between magnetic north and true north must, therefore, be Any magnetized object, an object with two taken into account when navigating with a oppositely charged ends, such as a magnet map and a compass. -
Regional Fact Sheet – North and Central America
SIXTH ASSESSMENT REPORT Working Group I – The Physical Science Basis Regional fact sheet – North and Central America Common regional changes • North and Central America (and the Caribbean) are projected to experience climate changes across all regions, with some common changes and others showing distinctive regional patterns that lead to unique combinations of adaptation and risk-management challenges. These shifts in North and Central American climate become more prominent with increasing greenhouse gas emissions and higher global warming levels. • Temperate change (mean and extremes) in observations in most regions is larger than the global mean and is attributed to human influence. Under all future scenarios and global warming levels, temperatures and extreme high temperatures are expected to continue to increase (virtually certain) with larger warming in northern subregions. • Relative sea level rise is projected to increase along most coasts (high confidence), and are associated with increased coastal flooding and erosion (also in observations). Exceptions include regions with strong coastal land uplift along the south coast of Alaska and Hudson Bay. • Ocean acidification (along coasts) and marine heatwaves (intensity and duration) are projected to increase (virtually certain and high confidence, respectively). • Strong declines in glaciers, permafrost, snow cover are observed and will continue in a warming world (high confidence), with the exception of snow in northern Arctic (see overleaf). • Tropical cyclones (with higher precipitation), severe storms, and dust storms are expected to become more extreme (Caribbean, US Gulf Coast, East Coast, Northern and Southern Central America) (medium confidence). Projected changes in seasonal (Dec–Feb, DJF, and Jun–Aug, JJA) mean temperature and precipitation at 1.5°C, 2°C, and 4°C (in rows) global warming relative to 1850–1900. -
Machc19-05.4
19th Meeting of the MesoAmerica – Caribbean Sea Hydrographic Commission Regional Capacity Building Update of Brazil on its Regional Project International Hydrographic Organization Organisation Hydrographique Internationale Capacity Building in the Caribbean, South America and Africa - Hydrography Courses Brazil/DHN has been expanding its Capacity Building Project towards other countries in the Amazon region and in the Atlantic Ocean basin. COURSE DESCRIPTION DURATION C-Esp-HN Technician in Hydrography and Navigation (Basic Training) 42 weeks C-Ap-HN Technician in Hydrography and Navigation (IHO Cat. “B”) 35 weeks CAHO Hydrographic Surveyors (IHO Cat. “A”) 50 weeks 2018 – 1 Bolivian Navy Officer (IHO Cat “A”). 2019 – Confirmed: 2 students from Saint Vincent and the Grenadines (IHO Cat “A”). Confirmation in progress: Angola (6), Mozambique (4), Bolivia (1), Colombia (1) and Paraguay (1) (IHO Cat “A” and “B”). 2020 – In the near future, Fluminense Federal University (UFF) and other Brazilian universities and governmental institutions in cooperation with DHN will develop a Hydrography Program and a Nautical Cartography Program. International Hydrographic Organization Organisation Hydrographique Internationale 2 Capacity Building - IHO Sponsored Trainings/Courses Work Program Training/Course Date 2018 Maritime Safety Information (MSI) Training Course 16-18 October 18 participants from 12 different countries Argentina (2) Brazil (6) Bolivia (1) Colombia (1) Ecuador (1) El Salvador (1) Guyana (1) Liberia (1) Paraguay (1) Peru (1) Uruguay (1) -
Equivalence of Current–Carrying Coils and Magnets; Magnetic Dipoles; - Law of Attraction and Repulsion, Definition of the Ampere
GEOPHYSICS (08/430/0012) THE EARTH'S MAGNETIC FIELD OUTLINE Magnetism Magnetic forces: - equivalence of current–carrying coils and magnets; magnetic dipoles; - law of attraction and repulsion, definition of the ampere. Magnetic fields: - magnetic fields from electrical currents and magnets; magnetic induction B and lines of magnetic induction. The geomagnetic field The magnetic elements: (N, E, V) vector components; declination (azimuth) and inclination (dip). The external field: diurnal variations, ionospheric currents, magnetic storms, sunspot activity. The internal field: the dipole and non–dipole fields, secular variations, the geocentric axial dipole hypothesis, geomagnetic reversals, seabed magnetic anomalies, The dynamo model Reasons against an origin in the crust or mantle and reasons suggesting an origin in the fluid outer core. Magnetohydrodynamic dynamo models: motion and eddy currents in the fluid core, mechanical analogues. Background reading: Fowler §3.1 & 7.9.2, Lowrie §5.2 & 5.4 GEOPHYSICS (08/430/0012) MAGNETIC FORCES Magnetic forces are forces associated with the motion of electric charges, either as electric currents in conductors or, in the case of magnetic materials, as the orbital and spin motions of electrons in atoms. Although the concept of a magnetic pole is sometimes useful, it is diácult to relate precisely to observation; for example, all attempts to find a magnetic monopole have failed, and the model of permanent magnets as magnetic dipoles with north and south poles is not particularly accurate. Consequently moving charges are normally regarded as fundamental in magnetism. Basic observations 1. Permanent magnets A magnet attracts iron and steel, the attraction being most marked close to its ends. -
North America and the Caribbean
6 - 223540 - Americas 06/11/02 1:53 Side 272 North America and the Caribbean Recent Developments North America remains an important region of asylum and of resettlement for refugees. In Canada, the number of asylum-seekers dropped in the first eight months of 2002 by 29 per cent compared Antigua and Barbuda with 2001 (partly as a consequence of new visa Bahamas requirements). However, it is expected that the Barbados number of refugees who find a durable solution in Canada Canada will remain roughly the same in 2002 as in Cuba 2001. This figure will include those who gain Dominica recognition as refugees within Canada’s asylum Dominican Republic procedure, those selected for resettlement from Grenada abroad, and close relatives of refugees (admitted Haiti for family reunification). In the United States, the Jamaica average number of asylum-seekers submitting St. Kitts and Nevis asylum claims will also remain the same in 2002 as St. Vincent and the Grenadines in 2001. St. Lucia Trinidad and Tobago The events of 11 September 2001 continued to United States of America have a wide range of impacts on North America’s 6 - 223540 - Americas 06/11/02 1:53 Side 273 immigration and refugee policies. In October 2001, In Canada, immigration and refugee policies have the US Congress passed anti-terrorism legislation long been intertwined. A new Immigration and (USA PATRIOT Act), which included several provi- Refugee Protection Act entered into force at the sions affecting asylum-seekers and refugees in the end of June 2002 to respond to heightened secu- United States, including an expansion of the rity concerns. -
North American Deserts Chihuahuan - Great Basin Desert - Sonoran – Mojave
North American Deserts Chihuahuan - Great Basin Desert - Sonoran – Mojave http://www.desertusa.com/desert.html In most modern classifications, the deserts of the United States and northern Mexico are grouped into four distinct categories. These distinctions are made on the basis of floristic composition and distribution -- the species of plants growing in a particular desert region. Plant communities, in turn, are determined by the geologic history of a region, the soil and mineral conditions, the elevation and the patterns of precipitation. Three of these deserts -- the Chihuahuan, the Sonoran and the Mojave -- are called "hot deserts," because of their high temperatures during the long summer and because the evolutionary affinities of their plant life are largely with the subtropical plant communities to the south. The Great Basin Desert is called a "cold desert" because it is generally cooler and its dominant plant life is not subtropical in origin. Chihuahuan Desert: A small area of southeastern New Mexico and extreme western Texas, extending south into a vast area of Mexico. Great Basin Desert: The northern three-quarters of Nevada, western and southern Utah, to the southern third of Idaho and the southeastern corner of Oregon. According to some, it also includes small portions of western Colorado and southwestern Wyoming. Bordered on the south by the Mojave and Sonoran Deserts. Mojave Desert: A portion of southern Nevada, extreme southwestern Utah and of eastern California, north of the Sonoran Desert. Sonoran Desert: A relatively small region of extreme south-central California and most of the southern half of Arizona, east to almost the New Mexico line. -
A Glance at Member Countries of the Mesoamerica Integration and Development Project, (LC/MEX/TS.2019/12), Mexico City, 2019
Thank you for your interest in this ECLAC publication ECLAC Publications Please register if you would like to receive information on our editorial products and activities. When you register, you may specify your particular areas of interest and you will gain access to our products in other formats. www.cepal.org/en/publications ublicaciones www.cepal.org/apps Alicia Bárcena Executive Secretary Mario Cimoli Deputy Executive Secretary Raúl García-Buchaca Deputy Executive Secretary for Administration and Analysis of Programmes Hugo Eduardo Beteta Director ECLAC Subregional Headquarters in Mexico This document was prepared by Leda Peralta Quesada, Associate Economic Affairs Officer, International Trade and Industry Unit, ECLAC Subregional Headquarters in Mexico, under the supervision of Jorge Mario Martínez Piva, and with contributions from Martha Cordero Sánchez, Olaf de Groot, Elsa Gutiérrez, José Manuel Iraheta, Lauren Juskelis, Julie Lennox, Debora Ley, Jaime Olivares, Juan Pérez Gabriel, Diana Ramírez Soto, Manuel Eugenio Rojas Navarrete, Eugenio Torijano Navarro, Víctor Hugo Ventura Ruiz, officials of ECLAC Mexico, as well as Gabriel Pérez and Ricardo Sánchez, officials of ECLAC Santiago. The comments of the Presidential Commissioners-designate and the Executive Directorate of the Mesoamerica Integration and Development Project are gratefully acknowledged. The views expressed in this document are the sole responsibility of the author and may not be those of the Organization. This document is an unofficial translation of an original that did not undergo formal editorial review. The boundaries and names shown on the maps in this document do not imply official endorsement or acceptance by the United Nations. Explanatory notes: - The dot (.) is used to separate the decimals and the comma (,) to separate the thousands in the text.