What is science fiction? 

Science Fiction is a genre of fiction dealing with the impact of imagined innovations in science or technology; often in a futuristic setting. it is a realistic speculation of what the future may or may not be like. Science Fiction has entertained audiences for many years. Often set in the future, possibilities are at their core. it is often difficult to define a science fiction.

A few examples of a science fiction film would be...

- The Matrix
- Alien
- Avatar
- Star Wars
- Star Trek

The sub genres 

Alien invasion
  -Alien
  - Cloverfeild

Nuclear threat
  - 2012

Mutations of creatures
  - X-Men

Space invasions
  - Star Wars
  - Star Trek