movie about ball shaped aliens making people vanish

In Arborville, California, three high school students try to protect their hometown from a gelatinous alien life form that engulfs everything it touches.

A drive-in favorite, this sci-fi classic follows teenagers Steve and his best girl, Jane, as they try to protect their hometown from a gelatinous alien life form that engulfs everything it touches. The first to discover the substance and live to tell about it, Steve and Jane witness the blob destroying an elderly man, then it growing to a terrifying size. But no one else has seen the goo, and policeman Dave refuses to believe the kids without proof.

A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.

The residents of San Francisco are becoming drone-like shadows of their former selves, and as the phenomenon spreads, two Department of Health workers uncover the horrifying truth.

Several scientists create drama around a mysterious black ball.

When a group of small aliens accidentally abandons one of their own on Earth, adventurous kids Max and Pete stumble upon the "Glitterball" and attempt to return it to its mother ship. As the children learn more about the friendly alien and its magical powers, they must protect their new companion from an army corporal and a small-time thief who are both hunting the extraterrestrial for their own cruel purposes.

Aliens, contacting scientist Adam Penner, inform him that they have been on the moon for twenty thousand years, undetected due to their invisibility, and have now decided to annihilate humanity unless all the nations of earth surrender immediately. Sequestered in an impregnable laboratory trying to find the aliens' weakness, Penner, his daughter, a no-nonsense army major and a squeamish scientist are attacked from outside by the aliens, who have occupied the bodies of the recently deceased.

A young astrophysicist searches for sinister extraterrestrials looking for sanctuary for their comrades by possessing the bodies of humans.

AV Supersunshine and Philomena Victor, married musicians from Wisconsin, approach a young filmmaker and ask for his help to tell their 'true' story: being abducted, experimented on, and taken off planet aboard a flying saucer. The couple send the filmmaker their home-made alien abduction film, and he sets out on a mission to either verify or discredit their experience. Unable to debunk the authenticity of the couple's story, the documentarian resorts to the use of psychological tactics in an attempt to make the couple turn their narratives against one another.

Two Aliens visit the Earth in an effort to enlist converts to travel the universe with them.