MIKAY SCIENCE Q3B PAGE 257 LAST PAGE

It travels at speed of 300 000km/s (a)  

It happens when light hits a smooth surface and bounces off to produce an image .

(a)  

It is the transfer of thermal energy .____

This is the measurement of how hot or how cold the object is .____

(a)  

It is produced by vibrating objects. (a)  

It is the loudness and softness of sound ______

It is the speed of vibrations _____

It is the unit to measure sound . ______

This is the unit used to measure the number of vibrations . ______

(a)  

Enumerate objects that give off light .

(a)  

Harmful effects of excessive exposure to loud sounds may inlcude headache which cause lose focus and concentration . ____

You will struggle to hear someone who is talking _____

true or false

(a)