An Alien extraterrestrial

What does alien mean?
What does extraterrestrial mean?
Do you think aliens are bad? Why or why not?
What connotations are associated with the word alien?
When you hear the word illegal aliens, what do you think?
How does language affect society?
Why do you like or dislike science fiction films?
What impact do science fiction films have on society?
Will humans be living on other planets someday?