Identify the medium for the following waves:

• The Wave Exercise waves:

• Ripples on a pond:

• Sound waves from a stereo speaker:

• Seismic (earthquake) waves:

1. I don't understand what wave exercise waves are?

2. Water is the medium.

3. Air is the medium.

4. The Earth or ground is the medium.

(I think these are right, as the medium is what they are travelling through.)