Really short quiz on declining neuter nouns in the 2nd declension!
For the endings, go here (the chart does not have the vocative endings—for the neuter nouns, the vocative endings are the same as the nominative endings).
Agreement of Nouns and Adjectives
The sky is blue.
Caelum est caeruleum.
Currus est caeruleus.
Rosa est caerulea.
We see a pig in the blue sky.
Videmus caeruleum porcum in caelo caeruleo.
Videmus caeruleam rosam.
The girl’s hair is black.
Comes puellae Romanae est nigra.