As far as researches go there are 7 types of ghosts.
"their"?
Yes there are. For example, there are poltergeists (noisy ghosts), apparitions, ghosts that appear as if they were a repeating section of film on a continuous loop, and ghost lights or orbs.
It depends, there are two types of ghosts, spirits and deadly ghosts, spirits, yes, deadly ghosts, no.
There are many ghosts at the howard school
If you believe in ghosts, than there are many ghosts in the world. There is not an exact answer because some move on just as some die and become ghosts.
The Many Ghosts of Doctor Graves was created in 1966.
Ghosts of Eden has 279 pages.
Skinner's Ghosts has 405 pages.
Who Let the Ghosts Out is 144 pages. I have the book(:
Ghosts appear in many different forms including:ShadowTransparentSemi-transparentSolidEnergyLightWind
Their are a lot of people that believe in ghosts, and their are a lot of people who don't believe in ghosts. No one really knows how many people believe in ghosts, but mostly thousands believe in ghosts. Some people can sense their presence, and the negative energy they bring.
It is the nature of ghosts that they do not appear in response to human summoning. Many ghosts do not seem to be aware of the presence of living persons at all.
Well there are poltergeists which move objects, Specters which are also called apparitions, banshees which make sounds often voices, Demons which of coarse harm people, and there are types of ghosts that use telephones but I'm not sure what their name is. So basically there are 5.