3. Earth is 150 million kilometers from
the sun, and the solar "wind" travels at about
400 km/sec. How long does it take particles from a solar
storm to reach Earth? (Hint: Time = Distance / Speed.
To convert from seconds to hours, divide the time in
seconds by 3600.)
4. What do you think would happen if Earth's
magnetic field became weaker or disappeared entirely?
5. In the illustration, where do you see
weaknesses in Earth's magnetic shieldplaces where
the magnetic field may allow solar wind particles near