CLASS8 · Physics · Sound or Light

Exercise and reference answers

Items

1. Item

   Travels through vacuum

   Answer

   right

2. Item

   Needs a medium to travel

   Answer

   left

3. Item

   Speed ≈ 343 m/s in air

   Answer

   left

4. Item

   Speed ≈ 3×10⁸ m/s in vacuum

   Answer

   right

5. Item

   Pitch and loudness

   Answer

   left

6. Item

   Reflection from a mirror

   Answer

   right

Categories

Left

Sound

Right

Light

Instructions

Sort each property: is it about sound or light?