Science Form 1, 2 & 3 Notes
Question 1:Does the distance of a sound source from the reflecting surface have any effect on the echo produced? Give your opinion. Answer:Yes, distance of source that is far from the surface causes sound to lose energy, resulting in a weaker echo. Question 2:Why is echo heard repeatedly in a cave? Answer:The rough walls of … Read more
Question 1:State one difference in the characteristics of the vibration of the voice box of men and women. Answer:The voice box of women produces sound with higher frequency compared to the voice box of men. So, women’s voice has a higher pitch. Question 2:If a musician plays a soft note, what is the characteristic that … Read more
Question:Aim: To study the Doppler effect of sound using an air horn.Apparatus: Air hornInstruction1. You are required to stand in the middle of the assembly area.2. Ask your friend to sound an air horn while running past you.3. Record the pitch of the sound of the air horn during and after your friend has run … Read more
Activity 10.2:Aim: To study the effect of amplitude on the loudness and the effect of frequency on the pitch of sound.Apparatus: Cathode Ray Oscilloscope (C.R.O.), audio signal generator, loudspeaker and connecting wireInstruction1. Arrange the apparatus as shown in Figure 10.6.2. Adjust the audio signal generator and C.R.O. until sound is produced and the waveform can … Read more
Question 1:State four sources of vibration that produce sound. Answer:Vibration of insect wings, vibration of plucked guitar strings, vibration of air in a trumpet and a pipe, vibration of a voice box.(Any other answers are accepted) Question 2:Tick (√) the correct statement regarding sound waves.(a) Sound waves can only be reflected. [ ](b) Astronauts can … Read more
Activity 10.1:Aim: To study the characteristics of sound waves.(A) Propagation(i) Requires a medium to propagateApparatus: Bell jar, polystyrene sheet, alarm clock and vacuum pumpInstruction1. Set up the apparatus as shown in Figure 10.1.2. Activate the alarm clock and listen to the sound produced.3. Then, turn on the vacuum pump to suck the air out.4. Record … Read more