Review#3 earth dimensions
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![Page 1: Review#3 earth dimensions](https://reader035.fdocuments.net/reader035/viewer/2022070316/55596519d8b42a93708b51af/html5/thumbnails/1.jpg)
L.O: REVIEW EARTH’S SHAPE, LATITUDE and LONGITUDE
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The true shape of Earth is an oblate sphere.
The earth is slightly flat at the poles and bulging at the equator.
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The true shape is an oblate sphere, but from space pictures it looks like a perfect sphere.
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POLARIS the NORTH star is a star that is ONLY seen in the northern hemisphere.
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POLARIS IS DIRECTLY OVER THE NORTH POLE..
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ALL THE STARS APPEAR TO REVOLVE AROUND POLARIS AT A VELOCITY 15 PER
HOUR.
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THE TWO POINTER STARS ON THE BIG DIPPER POINT TO POLARIS ON THE END OF THE LITTLE DIPPER.
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In the northern hemisphere, POLARIS’ altitude ALWAYS equals your latitude.
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WHAT IS THIS OBSERVER’S LATITUDE?
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52 DEGREES NORTH
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AS your latitude INCREASES, the altitude of Polaris ALSO INCREASES.
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the CHANGE IN THE altitude of Polaris is evidence that Earth is round.
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At the equator (zero degrees latitude), Polar is at zero altitude.
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At the north pole (90 degrees latitude) Polaris’ altitude is also 90 degrees.
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What is one latitude if Polaris is at 45 degrees?
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One’s latitude is also 45 degrees N
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On the regents, I will have to determine the latitude and longitudes of CITIES in NEW YORK
STATE and on other parts of EARTH.
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FINDING THE LATITUDES OF NEW YORK STATES CITIES IS EASY. I CAN USE THE MAP ON PAGE 3 OF
THE ESRT.
• LATITUDES IN NEW YORK STATE ARE BETWEEN 41 N AND 45N.
• LONGITUDES IN NEW YORK STATE ARE BETWEEN 72W AND 79 W.
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ON THE REGENTS, I WILL HAVE TO FIND THE LATITUDE AND LONGITUDE OF PLACES ON
EARTH
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THE IMPORTANT LATITUDES
THE EQUATOR LATITUDE IS ZERO.NORTH POLE 90 NSOUTH POLE 90 S.
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LONGITUDE
• EACH TIME ZONE IS 15 DEGREES WIDE.• EX: LOCATIONS WITH A 3 HOUR DIFFERENCE
IN TIME ARE: 3 X 15 = 45 DEGREES APART.
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Open your green workbook to page 204. complete typical latitude and longitude
questions.