All about sound /
Schlessinger Media ; First Light Pictures, Inc. ; executive producers, Andrew Schlessinger, Tracy Mitchell & Paul Kramer ; producer Olga Palacio.
- 1st. ed.
- Wynnewood, PA : Schlessinger Media, 2000.
- Schlessinger science library. Physical science for children .
1 videocassette (23 min.) : sd., col. ; 1/2 in. + teacher's guide.
Learn about sound from the source that creates it to the mechanics of the ear that hears it. Discover why sound needs a medium to travel, why there's none in space and why some animals see by using sound. Hands-on activity.
1572253398
Sound.
Physical sciences.
Video recordings for the hearing impaired.
1 videocassette (23 min.) : sd., col. ; 1/2 in. + teacher's guide.
Learn about sound from the source that creates it to the mechanics of the ear that hears it. Discover why sound needs a medium to travel, why there's none in space and why some animals see by using sound. Hands-on activity.
1572253398
Sound.
Physical sciences.
Video recordings for the hearing impaired.