If the distance represented by the letter A were increased, how would it change the way the sound was heard?  

How are electromagnets different from permanent magnets?

When you speak nothing is vibrating to create a sound.

The lines with arrows in the drawing are called __________. They are more concentrated _________. This is where the magnetic field is __________

The distance a magnet is from an object does not affect the magnet’s strength.

How do the vibrations from different sound sources compare for higher vs. lower pitch notes?  

Electrons are surrounded by an invisible force field.

All solid objects are elastic (springy) up to a point; they deform when a force is applied to them (we push or pull on them)

In the distance vs. strength experiment, the strength was measured by ___________, whereas in the type of magnet vs. strength experiment, the strength was measured by __________.

What happened when the drum was struck?