If you mean when it's a happy guinea pig then it's most likely to be popcorning a lot which is when they hop in the air(and this will look quite silly sometimes, but it's adorable to watch).
It is spelled "guinea pig". You got it right! :)
it depends on the guinea pig, it may act scared or shy, it may even act curious.
You can put them together during mating season. That's all you can do.
It depends what you like! :) I like Abyssinian's, also Tortoise Shell's and American's. If you look up on the internet for guinea pig breeds you will see all of them there. All guinea Pigs act the same and have similar behaviour pattern, so, I guess, there is no best breed of Guinea Pig.
Its a guinea pig!
Guinea Pigs poke with their nose to show greetings,emotions,etc.It is like saying hello to that Guinea Pig.
a guinea pig and a mouse aren't the same the guinea pig must have its own type of food like alphalpha pelets and hamsters should eat seeds,nuts,etc. Seeds and nuts are like poison to a guinea pig if the guinea pig and mouse are just eating alphalpha pelets (not seeds) i would say its ok.
It depends on the guinea pig. Mine loved to be pet.
An abyssinian guinea pig has Rossets in its fur such as the images below:
It depends on what kind of guinea pig you have. If you have a day time guinea pig then it will actually want light. But you probably have a night time meaning it is active at night then your guinea pig would not like the light.
Well it all depends on your cat and how it is. but you could try letting it smell the guinea pig on letting it see the guinea pig and when it is acts nice give get like a treat or love on it. To show it is the right thing to do around the guinea pig. I hope this help. Ps you real Can't make it like your guinea pig.
They do like company and would definitely prefer another guinea pig with them.