Yes.
ks3 means key stage 3
The Reflection.
duuugh type in google : ks3 vocab duuugh duuugh
Wiki won't help you cheat, so get to work.
no
well there really is no antonym that i know of for periscope because a periscope is an object.
It consists of a set of high quality glass prisms. These reflect the light down the length of the periscope to the eye piece. This allows the viewer to see the surface.
Emaths just type into google p.s do you know where to get the ks3 2010 answer book
someone discovered the periscope
a diagram of a periscope
KeyStage3= three