1What type of passage is this?
a news article
a textbook entry
an e-mail message
a blog post
2What is the main topic of this passage?
business
health
science
history
3Which topic is probably NOT discussed in this passage?
where auroras appear
what auroras look like
how auroras are formed
how auroras were discovered
4Which best describes this passage?
a general introduction to auroras
an explanation of the different types of auroras
an example of how auroras are used in literature
a discussion of how auroras affect the environment