Review#3 earth dimensions

L.O: REVIEW EARTH’S SHAPE, LATITUDE and LONGITUDE

The true shape of Earth is an oblate sphere.

The earth is slightly flat at the poles and bulging at the equator.

The true shape is an oblate sphere, but from space pictures it looks like a perfect sphere.

POLARIS the NORTH star is a star that is ONLY seen in the northern hemisphere.

POLARIS IS DIRECTLY OVER THE NORTH POLE..

ALL THE STARS APPEAR TO REVOLVE AROUND POLARIS AT A VELOCITY 15 PER

HOUR.

THE TWO POINTER STARS ON THE BIG DIPPER POINT TO POLARIS ON THE END OF THE LITTLE DIPPER.

In the northern hemisphere, POLARIS’ altitude ALWAYS equals your latitude.

WHAT IS THIS OBSERVER’S LATITUDE?

52 DEGREES NORTH

AS your latitude INCREASES, the altitude of Polaris ALSO INCREASES.

the CHANGE IN THE altitude of Polaris is evidence that Earth is round.

At the equator (zero degrees latitude), Polar is at zero altitude.

At the north pole (90 degrees latitude) Polaris’ altitude is also 90 degrees.

What is one latitude if Polaris is at 45 degrees?

One’s latitude is also 45 degrees N

On the regents, I will have to determine the latitude and longitudes of CITIES in NEW YORK

STATE and on other parts of EARTH.

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.

ON THE REGENTS, I WILL HAVE TO FIND THE LATITUDE AND LONGITUDE OF PLACES ON

EARTH

THE IMPORTANT LATITUDES

THE EQUATOR LATITUDE IS ZERO.NORTH POLE 90 NSOUTH POLE 90 S.

LONGITUDE

• EACH TIME ZONE IS 15 DEGREES WIDE.• EX: LOCATIONS WITH A 3 HOUR DIFFERENCE

IN TIME ARE: 3 X 15 = 45 DEGREES APART.

Open your green workbook to page 204. complete typical latitude and longitude

questions.