What Causes Ocean Currents? The systems of ocean surface currents and deep water currents are, as expected, connected, but the locations of the physical connections are limited to three areas (one per main ocean), and are all on the Northern Hemisphere. The downwelling occurs on the Northern Atlantic, while the upwelling occurs on the Northern Pacific and the Northern Indian Ocean, as shown on the side map. The extents of the continental shelf block, or at least seriously limit, the movement of the ocean currents. To see a 3D view of the Conveyor Belt enlarge the diagram below. 1. 2. 3. 4. There is basically just one area on the global ocean where the ocean currents floating as the components of the Conveyor Belt system downwell, performing a radical dive and a switch of the direction.
You decide Australia's population, we'll show you how it looks Australia's population has more than quadrupled in the past century, with the number of people tipped to reach 25 million this year. If current trends continue the population will top 40 million within 40 years. Some say Australia should have stopped growing decades ago. Others point out Australia is a wealthy country with plenty of space to welcome more. This is your chance to decide how big (or small) you think Australia should be. The chart below shows 24 potential paths for Australia's future population, based on the latest projections from the Australian Bureau of Statistics. Keep in mind: a growing population means more demand on resources. How many overseas migrants should Australia have in the future? How many children do you have (or would you like to have)? Ideally, what age would you want to live to? Changed your mind? Welcome to your future Australia Based on your choices, Australia's population would reach 17,117,492 in 2101. So how does that compare to the year you were born?
Glossary of geography terms A[edit] absolute humidity The mass of water vapor in the atmosphere per unit of volume of space.[1] absolute location The location of a point on the Earth's surface that can be expressed by a grid reference such as latitude and longitude.[2] accessibility resource A naturally occurring landscape feature that facilitates interaction between places.[1] accessibility A locational characteristic that permits a place to be reached by the efforts of those at other places.[1] acid rain Rain that has become more acidic than normal (a pH below 5.0) as certain oxides present as airborne pollutants are absorbed by the water droplets. active volcano A volcano that is currently erupting, or one that has erupted during the last 10,000 years (the Holocene) or during recorded history.[3] agricultural geography air mass A very large body of atmosphere defined by essentially similar horizontal air temperatures. alluvia Clay, silt, gravel, or similar detrital material deposited by running water.[1] alluvial soils arête
How a three-decade remaking of the city revived the buzz of 'Marvellous Melbourne' In the gallery of Australian art at Federation Square hangs John Brack’s iconic portrait of Melbourne in the 1950s — Collins Street, 5pm. This painting of the ritual march home from work to the suburbs depicts a city full of people and buildings, yet monochromatic and flat. It has become iconic not only because it captured a mid-20th-century conformity, but also because it stood for the loss of an intensive urbanity that had flourished in the “Marvellous Melbourne” of the late 19th century. While this era came to a crashing end with the 1890s depression, Melbourne did not fall into decline so much as into conformity and staidness. Through the early decades of the 20th century and two world wars Melbourne remained a major city, but the focus of its development shifted to the suburbs. Retail activity in the central city declined as suburban shopping malls burgeoned and planners surrendered the city to cars and parking. So how did the transformation happen? The complexities of density
This Massive Map Shows All of the World's Borders by Age To view the full resolution version of this massive map, click here. Defined borders are a relatively new concept in many parts of the world. In fact, until the latter half of the 20th century, most of the world was still wide open territory with loosely or completely undefined borders. On the European continent, however, jurisdiction over territory has been a fact of life for thousands of years. Over time, as territorial jurisdiction changed hands through war, marriage, and other arrangements, the map has been redrawn countless times. Even today, borders are far from set in stone. The Difficulty in Date Stamping Dividing Lines Creating a map that shows the age of all the world’s borders seems like an impossible feat, but Reddit user, PisseGuri82, was up to the challenge. These issues aside, the final product is a fascinating look at how we’ve divided the world up into nations. War and Pieces Many of the oldest borders in the world were established by treaties following a war. Thank you!
Animation: Human Population Growth Over All of History Imagine that for every million people on Earth, there was a single dot on a map. In total, that would be about 7,600 dots – representing today’s global population of 7.6 billion. But, what if we went back in time, and watched those dots accumulate over human history? The History of Population Growth Today’s animation comes from the American Museum of Natural History, and it shows over 200,000 years of population growth and the major events along the way. If you consider yourself on the more impatient side of things, we suggest starting at 1:50 which will zoom you to 400 AD – the time of India’s Golden Age. It took 200,000 years of human history to get to one billion people – and just 200 years to reach seven billion. That’s partly how the exponential “hockey stick” growth curve works, but it is also a factor of improvements in living standards, sanitation, and medicine that came after the Industrial Revolution. Key Population Moments Agriculture East vs. Bubonic Plague Thank you! Oops. Related
The 10 Worst River Basins Contributing to Ocean Plastics “[A new paper], published in the journal Environmental Science and Technology, calculates that rivers contribute between 410,000 and 4 million tonnes a year to oceanic plastic debris, with 88 to 95% [of that total] coming from only 10. Those rivers are the Yangtze, Yellow, Hai He, Pearl, Amur and Mekong in east Asia, the Indus and Ganges Delta in south Asia, and the Niger and Nile in Africa.” Source: cosmosmagazine.com Of river-based plastic pollution, these 10 rivers are responsible for 88%-95% of all the plastic gyrating in the world’s oceans. Improvement in these key places could make a world of difference in improving marine ecosystems (NOTE: the map came from this alternative article on the same subject). Tags: pollution, water, environment, sustainability, consumption, fluvial. Like this: Like Loading...
51 World Geography Games for Kids World Geography Games is a free site that features 51 geography games. The games are simple identification games in which students are shown the name of a country, state, city, or geographic feature and then have to click on the correct locations. Students earn points for each correct answer. World Geography Games tracks how many attempts students make at correctly answering each question. Applications for Education The concept of the World Geography Games is not unique. The aspect of the World Geography Games that is interesting is that students have unlimited attempts at correctly answering a question.
Folding paper globes - origami globes - MapScaping Whether you are looking for a fun family project, a teaching resource or just want something interesting and unique to decorate your home or office with these printable globes are just the thing. The graphic on each globe is not just a pretty picture, made from real topographic data, each globe is a great way of exploring our earth. The globes are designed to be printed in A3 but A4 is fine too.