Saw dust.
A rip saw is a saw designed to cut with the grain, it generally has more aggressive teeth. A saw designed to cut across the grain is called a cross cut saw.
to cut very easily round objects and material
The drop saw cuts by the blade resting on the material it's cutting. When the cut is finished the blade drops to a rest spring .
A junior saw is a saw that is used to cut PVC and metal. The blades for it come in different sizes depending on the material you are cutting.
hardness
the saw cut space is called a 'kerf'
The smell of metal burning as you cut it with an abrasive material.
Support your material so it is not able to close as you are in the cut.
I always cut acrylics on a table saw with a very thin veneer blade with many small teeth. It's very important not to overheat this material as you cut it.
Burrs.
cutting holes in paneling weather its plasterboard etc.
Cross cut or rip cut depending on which direction you go.