4th grade waves, light and senses

Quick answer

In 4th grade (ages 9–10), children model waves by amplitude and wavelength, learn that we see when light reflects into our eyes, and explore how animal senses work. Start with Generation Genius "Waves for Kids", then light, eyes and SciShow Kids animal senses. Play all on repeat, or loop one diagram.

Play all on repeat

Videos in this playlist

  1. 1Waves for Kids | Wavelength & Amplitude | Science Lesson for Grades 3-5 | Mini-ClipWaves for Kids | Wavelength & Amplitude | Science Lesson for Grades 3-5 | Mini-ClipGenerationGeniusPlay from here Loop
  2. 2What Are Waves? | Science at the Beach! | SciShow KidsWhat Are Waves? | Science at the Beach! | SciShow KidsSciShow KidsPlay from here Loop
  3. 3Wave Motion | Waves | Physics | FuseSchoolWave Motion | Waves | Physics | FuseSchoolFuseSchool - Global EducationPlay from here Loop
  4. 4Transverse & Longitudinal Waves | Waves | Physics | FuseSchoolTransverse & Longitudinal Waves | Waves | Physics | FuseSchoolFuseSchool - Global EducationPlay from here Loop
  5. 5What Is Sound? for KidsWhat Is Sound? for KidsLearn BrightPlay from here Loop
  6. 6What is Sound? | Physics for Kids | SciShow KidsWhat is Sound? | Physics for Kids | SciShow KidsSciShow KidsPlay from here Loop
  7. 7Light for Kids | Where does light come from? Learn all about light in this fun introduction video.Light for Kids | Where does light come from? Learn all about light in this fun introduction video.Learn BrightPlay from here Loop
  8. 8Science of LIGHT for Kids | Reflection & Vision | Lesson for Grades 3-5Science of LIGHT for Kids | Reflection & Vision | Lesson for Grades 3-5GenerationGeniusPlay from here Loop
  9. 9The Human Eye for Kids | Learn why and how eyes allow us to seeThe Human Eye for Kids | Learn why and how eyes allow us to seeLearn BrightPlay from here Loop
  10. 10How Eyes Let Us See The World | SciShow KidsHow Eyes Let Us See The World | SciShow KidsSciShow KidsPlay from here Loop
  11. 11The Science of Light and Color for Kids: Rainbows and the Electromagnetic Spectrum - FreeSchoolThe Science of Light and Color for Kids: Rainbows and the Electromagnetic Spectrum - FreeSchoolFree SchoolPlay from here Loop
  12. 12What Is a Rainbow? | Rainbows for Kids | Learn how and why rainbows formWhat Is a Rainbow? | Rainbows for Kids | Learn how and why rainbows formLearn BrightPlay from here Loop
  13. 13Senses and the Brain Video Lesson for Kids | Science Lesson for Grades 3-5 | Mini-ClipSenses and the Brain Video Lesson for Kids | Science Lesson for Grades 3-5 | Mini-ClipGenerationGeniusPlay from here Loop
  14. 14Senses You Didn’t Know You Have | SciShow KidsSenses You Didn’t Know You Have | SciShow KidsSciShow KidsPlay from here Loop
  15. 15How Do Insect Eyes Work? | Compound Eyes | Amazing Animal Senses | SciShow KidsHow Do Insect Eyes Work? | Compound Eyes | Amazing Animal Senses | SciShow KidsSciShow KidsPlay from here Loop
  16. 16How Do Bats See with Sound? | Echolocation | Amazing Animal Senses | SciShow KidsHow Do Bats See with Sound? | Echolocation | Amazing Animal Senses | SciShow KidsSciShow KidsPlay from here Loop
  17. 17Why Do Animals Have Whiskers? | Amazing Animal Senses | SciShow KidsWhy Do Animals Have Whiskers? | Amazing Animal Senses | SciShow KidsSciShow KidsPlay from here Loop
  18. 18How Do Snakes Smell With Their Tongues? | Amazing Animal Senses! | SciShow KidsHow Do Snakes Smell With Their Tongues? | Amazing Animal Senses! | SciShow KidsSciShow KidsPlay from here Loop
  19. 19How Sharks Find Food With Electricity! | Amazing Animal Senses | SciShow KidsHow Sharks Find Food With Electricity! | Amazing Animal Senses | SciShow KidsSciShow KidsPlay from here Loop
  20. 20Information Transfer Video for Kids | Morse Code 101010 | Science Lesson for Grades 3-5 | Mini-ClipInformation Transfer Video for Kids | Morse Code 101010 | Science Lesson for Grades 3-5 | Mini-ClipGenerationGeniusPlay from here Loop
  21. 21Communication Using Light and Sound | Science for Kids | Kids AcademyCommunication Using Light and Sound | Science for Kids | Kids AcademyKids AcademyPlay from here Loop
  22. 22Science Max | FULL EPISODE | Light Challenge | Season 2Science Max | FULL EPISODE | Light Challenge | Season 2Science Max - ScholasticPlay from here Loop
  23. 23🔊Science Max - SOUND - Home Experiments🔊🔊Science Max - SOUND - Home Experiments🔊Science Max - ScholasticPlay from here Loop
  24. 24Your Body's Senses | SciShow Kids CompilationYour Body's Senses | SciShow Kids CompilationSciShow KidsPlay from here Loop

What does this waves and light unit cover?

It covers wave patterns, amplitude and wavelength, sound as a wave, light and reflection, how the eye sees, and how animals use senses like echolocation. It ends with sending messages using patterns. A child should explain how light lets us see an object.

How does RepeatWatch help with waves and light?

Set an A–B loop on one diagram, like light bouncing into an eye, and pause to draw it. Slow animations to 0.75×, save the waves, light and senses parts on keys 1–9, and stop after a few loops to keep screen time short.

Frequently asked questions

What grade learns about waves and light?

In the US, the NGSS 4th grade standards (4-PS4 and 4-LS1) cover wave patterns, how light reflecting from objects lets us see, and how animals take in information through senses. Grade levels vary by country and school.

What is a good hands-on follow-up?

Try a flashlight and mirror to bounce light onto a target, or a slinky to show waves. Watch the related clip first, then replay the key part afterward to compare what you saw with the explanation.