1. Earth’s Shape, Size and Composition
Unit 1: Planet Earth
Earth’s Shape, Size and Composition

2. What is the Shape of the Earth?
Nearly Perfect Sphere
Evidence:
Photo’s,
Sailing Ships Mast,
Path of sun and other celestial objects in the sky seen from different locations at the same time,
Earth’s shadow on the moon during a lunar eclipse,
force of gravity is nearly equal everywhere on Earth’s surface

7. True Shape of the Earth:
Oblate Spheroid
Distance around the poles is less (40,008km) than the distance around the equator (40,076km)
Earth is perfectly smooth as well compared to its size...like a billard ball

8. What is Earth Made of? Recall the four nonliving zones: Lithosphere
Hydrosphere
Atmosphere
Cryosphere

9. All information regarding the earth’s composition
Is found on p 1 ESRT
atmosphere