Maps and Geography
By Ken Jennings and Mike Lowery
4/5
()
About this ebook
With this Junior Genius Guide to maps and geography, you’ll become an expert and wow your friends and teachers with clever facts: Did you know that the biggest desert in the world is actually covered in snow? Or that Christopher Columbus wasn’t the first to think that the Earth was round? With great illustrations, cool trivia, and fun quizzes to test your knowledge, this guide will have you on your way to whiz-kid status in no time!
Ken Jennings
Ken Jennings is the New York Times bestselling author of Brainiac, Maphead, Because I Said So!, and Planet Funny. In 2020, he won the “Greatest of All Time” title on the quiz show Jeopardy! and in 2022, he succeeded Alex Trebek as a host of the show. He is living in Seattle during his mortal sojourn, but his posthumous whereabouts are still to be determined.
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Reviews for Maps and Geography
18 ratings4 reviews
- Rating: 4 out of 5 stars4/5Got this book for my daughter's third-grade class. Couldn't resist a peek at it, and it was so fun and engaging that I read the whole thing. It might be a little too advanced for 3rd-graders, but then again, my kids were pretty darn sharp when they were 8 years old. <3
- Rating: 5 out of 5 stars5/5good the light in every way possible to have a
- Rating: 4 out of 5 stars4/5I really enjoyed reading your book. I read enthusiastically and understood the story. If you have some great stories like this one, you can publish it on Novel star, just submit your story to [email protected] or [email protected]
- Rating: 1 out of 5 stars1/5come on really 11 pages!?!?!?
Book preview
Maps and Geography - Ken Jennings
All right, class, that’s the bell. Everyone please find your seats and quiet down.
I’m Professor Jennings, and I’ll be teaching today’s class on maps and geography. You could probably tell I’m the teacher because I’m a lot taller than you, and I have a big desk with a nameplate that says PROFESSOR JENNINGS. Also I’m wearing a graduation hat and gown and holding a globe and I have a huge head crammed full of knowledge. Junior Geniuses: I’m here to share some of that knowledge with you.
But let me remind you that being a Junior Genius has nothing to do with the size of your noggin or the thickness of your glasses or even the grades on your report card. It’s a state of mind. Junior Geniuses are interested in the world around them and excited to learn all they can about it—especially the cool, weird stuff. As the Junior Genius motto reminds us: Semper quaerens. That’s Latin for Always curious.
Please rise, put your right index finger to your temple, and face this drawing of Albert Einstein. We will now say the Junior Genius Pledge.
With all my fellow Junior Geniuses, I solemnly pledge to quest after questions, to angle for answers, to seek out, and to soak up. I will hunger and thirst for knowledge my whole life through, and I dedicate my discoveries to all humankind, with trivia not for just us but for all.
Very good. You may be seated!
The Earth from Space
Geography
comes from the Greek word for description of the Earth.
Geo-
means Earth,
like in geology.
The -graphy
part means to write,
like in graphic
or biography.
So geographers study and describe the Earth.
This is the Earth. It is our home, unless any of you are aliens who have secretly invaded our planet for your own purposes. If so, please see me after class.
You might have heard or read that Columbus proved the Earth was round in 1492, when he sailed from Spain to the Caribbean. This is not even close to true! By Columbus’s time, scientists had known the Earth was round for almost two thousand years.
The Shape the World Is In
The earliest Greek thinkers disagreed about the shape of the Earth. Thales thought it was a round, flat disk floating in water, like a pancake that’s fallen overboard at sea.
Anaximander thought the Earth was a cylinder, while Anaximenes (no relation) believed it was a flat rectangle floating on compressed air.
But by 500 BC or so, most people agreed with the philosophers Pythagoras and Aristotle: The Earth was round, like a ball. There was good evidence for this.
If you really want to celebrate the discovery of round Earth, don’t celebrate Columbus Day on October 12—celebrate Eratosthenes (air-uh-TOSS-thuh-neez
) Day on June 21! Eratosthenes was the Greek who invented the word geography
and a very smart guy—in fact, he was the head librarian at the ancient world’s largest library, in Alexandria. Around 240 BC, Eratosthenes devised a very clever experiment to measure the Earth. In late June, on the longest day of the year, he had two sticks placed straight in the ground in two different cities, five hundred miles apart, and measured their shadows. The shadows were different lengths, which meant the sticks weren’t parallel—the Earth was round after all!
What’s more, Eratosthenes could use the length of the shadow to calculate the size of the entire Earth, without ever leaving Egypt. His measurement was about 24,600 miles, and today we know that the Earth actually measures 24,902 miles around at the equator. Eratosthenes was off by just a few hundred miles!
The Accidental Tourist
Columbus, however, didn’t get the memo. For his 1492 voyage, he relied on maps made by Egyptian scientist Ptolemy (the P is silent, luckily, or his name would be a pterrible ptongue ptwister). Ptolemy’s math led him to believe that Europe and Asia were quite a bit wider than they actually are, so Columbus thought he could circle the Earth in just 16,000 miles! The world’s best navigators at the time were the Portuguese, and they knew this was crazy talk. Their own guess was close to Eratosthenes’s: about 26,000 miles. Columbus set off anyway, sure that he could get all the way to China and India in a matter of weeks. Luckily, there was a big unknown continent in the way (Spoilers! It was North America!) or he would have been lost at sea forever. India was four times farther away than he thought, and he would have run out of supplies months before arriving.
Doing Their Level Best
Despite all the geographical evidence, there are people who still believe that the Earth is flat. The largest organization for these unscientific souls is the Flat Earth Society, founded by a British sign painter in 1956, the year before the space age began.
The Earth proposed by this group is a big, flat disk like Thales suggested, with the North Pole in the center. Antarctica is a big wall of ice around the edge, which luckily keeps the oceans from leaking off!
The society’s membership peaked at about two thousand in the 1970s, but today it’s down to a few hundred true believers. Of course, it’s a lot harder to believe in a flat Earth now that spaceships and satellites are orbiting the Earth and sending back pictures all the time. During the 1950s, the society’s founder was given one of the first photos of a round Earth taken from space. It is easy to see how such a picture could fool the untrained eye,
he calmly replied.
Let’s Not Wait; It’s a Really Long Line
The grid of north–south and east–west lines that you see on maps is used to mark latitude and longitude. (IMPORTANT NOTE: These lines are imaginary! You will not see them by looking out the window of an airplane!) Latitude is a measurement of how far north or south you are, while longitude measures east and west.
Official Junior Genius Way to Remember Which Is Which
Latitude
lines go from side to side, like the rungs of a ladder.
Longitude
lines travel from the North to South Poles—a really long
way.
If you were to stand at one of the poles, it would take the Earth’s rotation a full day to turn you in a circle—in other words, you’d be moving veeeeery slowly. But at the