Below are ideas for extending this topic beyond the activity & exploration you just completed.

• Lesson Assessment and Answer Key
• Readings: Four readings about sound and hearing.
• Activity: This simple experiment lets you see sound vibrations.
  
• Video: Just for fun, watch everyday objects dance when you put them on a speaker and turn up the sound.

Readworks and Newsela offer readings free with registration. All include comprehension questions.

• Three Cheers for Ears — Two friends visit a science museum and learn about how their ears work. (Grade 3)
• Deepsea Noises — Learn about all the sounds scientists have heard in the deepest part of the ocean. (Grade 3 — in English & Spanish)
• Underwater Blasts — Scientists worry about how undersea blasts may affect whales. (Grade 4)
• Dancing Underwater — Dancers become scuba divers to perform new underwater ballet. (Grade 4)

For a very simple way to see sound vibrations, watch this video from HooplaKidzLab. This experimenter uses a bowl & plate, plastic cling film, and candy sprinkles.

If you want to try this experiment with a large group, we suggest using a plastic bowl or cup with a big rubber band to hold the plastic film in place. Substitute salt for the candy sprinkles and encourage students to hum, rather than speaking. (It’s too easy to blow away the salt with a shout.)