Correct! :D In case you want to know what a Korean word exactly means in the native speaker's head, try image search pls.
The Korean word for "field trip" is 수학여행.
fyi, 수학 is a Sino-Korean word, homonym meaning either mathematics or "to study"
Just a note for Duo, none of the hover hints are the correct answer for the vocab in this chapter. One hover hint is 밭, which Duo offers as an alternative answer, but we haven't learned that. The word that we've been given for this chapter, 들판, is not one of the hover hints.