P8 – Crash, Bang!!
(Light and Sound)
1) Light and sound travel as ______________. 2) Sound is caused by _______________. 3) Which cannot travel through a vacuum? _______________ b) Why not? ________________________________________________________________ 4) When light hits a plane mirror, angle of incidence ______ angle of reflection. 5) In sound, high frequency = _____________________ b)
low amplitude = _____________________
6) Which of these, a – d, is a high pitched, quiet sound? _____________
7) When we see look at an object in a mirror what we‟re actually seeing is an i__________. 8) All objects which we can see either ___________ or ______________ light. 9) If you are watching a fireworks display, which will happen first? q You see the explosion, then hear the explosion q You hear the explosion, then see the explosion 10) Why does this happen? _____________________________________________________