Learn Russian: В парке тихо. - It is quiet in the park.

Because it describes a location, which means we need the Prepositional case. The dictionary form is the masculine noun парк. To say "in the park", we use the preposition в and add the ending -е, giving us в парке.

Where are the words for "It is" in the Russian sentence?

Russian doesn't use a phrase like "it is" to describe an environment, atmosphere, or weather. Instead, it simply uses the adverb тихо (quiet or quietly) all by itself to express the state of the park.

Is the preposition в pronounced like a "v" or an "f" here?

It sounds like an "f". The next letter, п, is a voiceless consonant (made without vibrating your vocal cords). Because they are right next to each other, the в matches the п and loses its voice. You pronounce the whole phrase together like "фпарке" (fparke).

Could I switch the words around and say Тихо в парке?

Yes, Russian word order is flexible. However, В парке тихо is the most natural way to say it. When setting a scene, Russian usually puts the location first (Where are we?) and the description last (What is it like there?).