Revision- sounds

03.29.2020
10:27:11
Grade 4- science- Today’s topic for revision-High and low sounds- (learner’s book- pages 64 and 65)
Main points-
1)The pitch of a sound is high or how low that sound is.
2)The faster the vibrations, the higher the pitch of the sound.
3)We can raise the pitch on a stringed instrument by making the string thinner, shorter or tighter.
Homework worksheet is given on sounds.