Read the introduction from a science website. Which focus question is the author trying to answer? How does a nine-volt battery
work? Electromagnetic force sounds very complicated, but I wanted to understand how it works. My experiment allowed me to create my own electrical field using a nine-volt battery, an iron nail, and some paperclips. This experience helped me understand electromagnetism and the way it works. How does electromagnetic force work? How much electricity is stored in a battery? O How much iron is contained in paperclips?
Photosphere - The photosphere is the deepest layer of the Sun that we can observe directly. It reaches from the surface visible at the center of the solar disk to about 250 miles (400 km) above that
