Fasiten ligger på svararket.

Because -en makes the noun definite.

• en fasit = an answer key / a set of correct answers
• fasiten = the answer key

In this sentence, Norwegian is talking about a specific answer key that both speaker and listener are expected to know about, so the definite form is natural.

Also, fasit is usually a common-gender noun, so the definite ending is -en.

Fasit usually means the answer key, the official answers, or the correct solutions.

It does not usually mean a student’s own answer. For that, Norwegian would normally use svar.

So:

• svar = answer
• fasit = answer key / correct answers

Literally, yes: ligger is the present tense of å ligge, which means to lie.

But in sentences like this, Norwegian often uses ligge to mean be located, be found, or be lying somewhere.

So Fasiten ligger på svararket is understood as something like:

• The answer key is on the answer sheet
• The answer key can be found on the answer sheet

This is very natural in Norwegian when talking about where a physical thing is placed.

Norwegian often prefers a more specific verb for location than English does.

• er = is
• ligger = lies / is situated / is lying

With something like a sheet of paper or text on a page, ligger sounds natural because it suggests that the thing is physically there on a surface.

So:

• Fasiten er på svararket = understandable, but more neutral
• Fasiten ligger på svararket = more idiomatic and more physical/spatial

English often just says is, but Norwegian frequently chooses verbs like:

• ligge for things lying somewhere
• stå for things standing
• sitte for things/people sitting

Because på means on, and that is the natural choice for something written on a sheet or page.

An answer sheet is treated as a surface, so Norwegian says:

• på arket = on the sheet
• på siden = on the page

Using i would mean in, which does not fit as well with a flat sheet of paper.

So på svararket is the normal and idiomatic phrasing.

It is a compound noun:

• svar = answer
• ark = sheet
• svarark = answer sheet
• svararket = the answer sheet

The definite ending here is -et because ark is a neuter noun:

• et ark = a sheet
• arket = the sheet

A useful rule: in Norwegian compound nouns, the last part usually determines the gender. Since ark is neuter, svarark is neuter too.

This is the normal word order for a simple Norwegian statement:

• Fasiten = subject
• ligger = verb
• på svararket = prepositional phrase showing location

So the pattern is:

subject + verb + place

This is very standard in Norwegian main clauses.

You can also move the location to the front for emphasis:

• På svararket ligger fasiten.

That is grammatically possible, but the original sentence is the most neutral version.

Yes. Norwegian usually writes compound nouns as one word, where English often uses two.

So:

• svarark = answer sheet
• not svar ark

This is very important in Norwegian spelling. Native English speakers often want to separate the words, but Norwegian normally joins them.

Yes, that is the most natural reading.

The sentence suggests that the answer key is located on the answer sheet itself, either printed there or written there.

Because ligger på is a physical-location expression, it sounds more concrete than something abstract.

A rough approximation is:

FAH-see-ten LIG-ger po SVAR-ar-ke

A few notes:

• fasiten: stress is usually on the first syllable: FA-si-ten
• ligger: the gg sounds like a hard g sound, not like English j
• på has a long vowel, somewhat like paw in many English accents
• svararket is a compound, but it is pronounced smoothly as one word

If you want to sound natural, give the main stress to fasiten and a secondary stress to the first syllable of svararket.

Yes.

ligger is the present tense of å ligge.

So:

• å ligge = to lie / to be located
• ligger = lies / is lying / is located

Norwegian present tense often covers several English possibilities, depending on context. Here it simply states where the answer key is.