INTERIOR OF EARTH

Contents

1. Introduction 23

2. Sources of Information 23

2.1. Direct Sources 23

2.2. Indirect Sources 23

2.2.1. Temperature 23

2.2.2. Density 24

2.2.3. Pressure 24

2.2.4. Gravitation force 25

2.2.5. Magnetic surveys 25

2.2.6. Meteorites 25

2.2.7. The Moon 25

2.2.8. Evidence from Theories 25

2.2.9. Earthquake Waves 26

3. Structure of the Earth’s Interior 27

3.1. The Crust 28

3.2. The Mantle 28

3.3. The Core 29

4. Crust and Mantle vs. Lithosphere and Asthenosphere 30