Revision for primary 6

1- Sound wave consists of ………. and …………..


2- From the sources of noise pollution …………, ……………


3- The sound stops when the vibrating body ………. Its vibration.


4- Sound is produced due to ………. Of bodies.


5- Compression is formed when the molecules of air are ………..


6- Sound does not travel through ………. But it needs ……….. to travel throug it.


7- Sound travels through ………. as Air, ……… as water , and ………….


8- The sounds that cause distrubance and harm to the ears is called ……………


9- Rarefaction is formed when the molecules of air are ………….


10- When the light rays pass from water to air, they …………..

11- The length of shadow for the same body differs according to the ……….


12- When the light rays fall on a plane mirror, they …………………..


13- Light is an external factor affects the eye causing …………..


14- From the artifcial sources of light ………., …………. And ……………


15- When light rays fall on objects, they ………… to the eye.


16- Light travels in ………….. lines


17- …………. Is the change of the path of the light rays, when it moves from a transparent medium to another transparent medium.


18- Light affects …………. Causing the sensation of vision.


19- You see your pencil because ………. Falls on it, and ………… to your eyes.


20- The sources of light may be ……… or …………

21- The vision takes place due to the reflection of light from ………. onto the …………


22- The colour spectrum begins with the ………….. and ends with …………


23- The most famous arabic scientist in the field of light is ………..


24- From the natural sources of light are ……… and …………


25- The image formed through pin hole camera is …………..


26- The white light is formed of ……….. colours.


27- A ………… is formed in the sky after falling of rains.


28- The white light consists of seven colour that are called.


29- Light ……….. when pass through two different transparent media.


30- The result of the light refraction is that there is two depth one is ……… and the other is ……………