You can find cobwebs in abandoned mine shafts and strongholds.
No they are not
with a broom
yes
cob webs and spiders
Either spinnerets or cribellum. Cribellum is less common.
by rapping their young in cob webs
well, it depends, I havn't found it but maybe there's one that will be created. If anyone finds it, don't delete this. Just type it on the bottom
Do you mean "spiders that make cobwebs"? Do you mean "poisonous" (like hemlock tea) or venomous (like cobra venom)? The word "cob" in "cobweb" just meant "spider." So a cobweb is just a spider web. Not all spiders are venomous. No spiders are known to be poisonous. Since black widows make webs, some "cob spiders" are highly venomous.
you can find them around in dungeons or abandoned mineshafts in minecraft beta1.8 ut you can't acually break it you get string instead of a block
Simple: A dust web is made of particles of dust and dirt and other things such as leaves, just natural things. A spider web however, is made out of a special kind of silk that most spiders naturally produce and use to create/spin their webs.
You Either Ran out of gas, or your igniter has gone bad. if neither of these is the problem clean your burner, it maybe some cob webs got in there and restricting the flow of gas.
Cob