Is the earth magnetic?

Yes.

For one, it helps block projectiles and keep some from getting to our atmosphere. It also holds the moon in place. And the last thing I can think of at the moment is that it helps us determine...

I saw a show on this topic. Every once in a while the sun shoots out solar flares, these are made out of the suns material and are dangerous, they also go pretty far. Occasionaly one heads straight...

Scientist Believe Because the Earth's core is iron and Nickel it creates the magnetic field to protect us from the sun's rays and comet's.