- Science
- Waves and Wave properties
- Age 12-14
-
level: 6-9
- English
คำแนะนำของผู้เขียน
Bill Nye video and waves with questions.
คำแนะนำของผู้เขียน
Bill Nye video and waves with questions.
level: 6-9
Bill Nye video and waves with questions.
Bill Nye video and waves with questions.