We have reviewed the content of all resources listed below to be sure they are appropriate for supporting instruction. However, as the resources listed below are open-source materials, we cannot be held responsible for changes in content.
RESOURCES
The Physics Classroom website describes sound as a pressure wave. It explains compressions and rarefactions with graphics and explains what a wavelength is.
This video explains sound wave characteristics. Not only does it describe compression and rarefactions, but also frequency, amplitude, and wavelength.
The Physics Classroom simulator allows the user to see what happens when frequency, wave speed, and amplitude are adjusted. Notes and exercises are included.
This NOAA website explains what makes up sound including frequency, wavelength, and amplitude. It also discusses that sound travels differently in air than it does in water. The website also discusses the SOFAR channel and has a link that the user can follow for more information.
This video discusses the SOFAR channel and where it is found in the ocean. The website explains that sound pollution in the ocean blocks some of the sound transmission in the ocean. Parts of the video are hard to hear. The video ends with questions by two individuals in various locations in a house.
The DiscoverWildlife website describes how sea animals echolocate. It talks about why an ocean animal would echolocate. It also talks about bats and birds that echolocate.
This Living Waters video explains echolocation by using a dolphin. It describes how dolphins use echolocation to hunt.