This lesson connects life science with physical science. The life science aspect is investigating how animals communicate, while the physical science focuses on how sound waves travel underwater. Students will use a video of whale songs to start the inquiry learning process. From that point students will use a KWL chart to record their initial, and developed understanding. The KWL charts focuses on what students know about sound. A PBS video is then used to build interest and enhance initial knowledge. The next step in the lesson is a sound activity that is completed together in a large group format. Students will use slinkys to model and observe waves. In the More Resources portion of the lesson students can also use PHeT simulations to develop deeper knowledge of waves and their interactions. Pairs of students then complete math problems to understand how waves move through water. The lesson is assessed by having students update their KWL chart to reflect their knowledge growth.