1. The Terrestrial Planets, Part II
The Earth

2. EARTH

3. Physical Data Diameter: 12,756.3 km Mass: 5.976x1027 g
Density: g/cm3
Rotation Period: 23.9 hours
Tilt of Axis: 23.5o
Surface Temperature: K

4. Physical Data Orbital Semi-Major Axis: 1.49x1011 m (1 AU)
Orbital Period: days
Orbital Inclination: 0o
Orbital Eccentricity: 0.017
Satellites: 1
Magnetic Field: yes

5. Earth’s Interior

6. Earth’s Interior Currents in the Mantle Cause Plate Tectonics
MOUNTAIN RANGE
R I F F S
OCEAN F L OOR
T R ENCH
CONT I NE NT
MANT L E CURR ENT S

7. Earth’s Surface
Continental Drift

8. Earth’s Surface

9. Earth’s Atmosphere 75.5% Nitrogen 23.1% Oxygen 1.29% Argon
% Water Vapor
0.05% Carbon Dioxide
0.0013% Neon
% Helium

10. Earth’s Atmosphere
( I on os phere )

11. The Ionosphere F2 F1 E D
F layers
combine
at night

12. The Ionosphere
Altitudes of the Ionospheric Layers

13. The Ionosphere
Reflection of Radio Waves

14. The Ionosphere
Creation of Ions

15. Earth’s Magnetic Field
Dipolar Field
Magnetic South Pole is Located in the Geographic North Pole! S S N N

16. Earth’s Magnetic Field
Van Allen Belts
Inner Belt - Positive Protons
Outer Belt - Negative Electrons e_ p+

17. Aurorae
From the ground m

18. Aurorae
The Auroral Oval
From Space
From the Space Shuttle

19. Magnetosphere
Van Allen Belts
gjjikui

20. The Moon

21. Earth’s Moon Average Distance to Earth: 384,400km (238,855 miles)
Orbital inclination: 5.1o
Diameter: 3476 km (0.273 DEarth)
Mass: 7.35x1025 g ( MEarth)
Surface Temperature: -274o F (night)
266o F (day)
Surface Gravity: Earth’s

22. The Moon’s Interior

23. The Moon’s Surface
Craters:
Maria:
Older Terrain
Younger Terrain

24. The Moon’s Surface Mare Orientale Largest impact crater on the Moon
Has three concentric circular mountain ranges created by the impact