1. Slightly flattened at the
TOPIC 3 MEASURING THE EARTH
The shape of the Earth:
The Earth is an -
Slightly flattened at the
Earth is represented by a-
Earth from space.
Earth looks like a-.

2. EVIDENCE OF EARTHS SHAPE:
The best evidence of earths shape are-
Gravity Measurements give us information about the –
(earths center)
Weight is slightly , than the equator.
As Latitude increases ( ), gravity and weight
Polar Diameter =
Equatorial Diameter =

3. The Altitude of Polaris gives you your latitude location only in the Northern Hemisphere..
Polaris is the It is a star located in the Little Dipper, also known as -
It sits directly above the earths , directly above the North pole.
Polaris can not be seen in -.
Big Dipper is-
Little Dipper is-

4. At the North Pole, the altitude of Polaris is *
At the Equator, the altitude of Polaris is *
In New York, the altitude of Polaris above the horizon is *
THE ALTITUDE OF POLARIS IS YOUR LATITUDE

5. As we move north from the Equator,- .
As we move south from the North Pole,
As we move EAST or WEST along the SAME LINE OF LATITUDE in the Northern Hemisphere,
Polaris in the past was used for purposes.
On ships, a sextant was used are still used today.