2. 3. Earths Magnetic Field
- Protects us from cosmic rays
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