1. Earths Magnetic Field

2. 3. Earths Magnetic Field

Vital to life on Earth

Due to the Iron core

Protects us from cosmic rays

Prone to reversal

4. Cosmic Rays

High energy, fast moving particles from the Sun and outside the solar system

5. Cosmic Rays

Hit upper atmosphere and create gamma rays

One cosmic ray can create hundred of gamma rays

6. Cosmic Rays

Gamma rays can __________ materials

This can cause damage to tissues and ________

7. 8. Cosmic Rays

Luckily, the Earths magnetic field deflects _________ particles, like cosmic rays, along its lines of force towards the _______

9. The Aurora Borealis 10. The Aurora Borealis

Caused by particles, ionised by cosmic rays, recombining with electrons and emitting light

11. Earths Magnetic Field 12. Earths Magnetic Field ( p56 )

Has lines of _______ and _______ like any magnet

Caused by _______ in the Earths _____ core