"Is our grandmother cold?"
Translation:Ist unserer Großmutter kalt?
Hmm. This can be tricky if you, like me, interpret it as a cold personality-- or probably the grandmother has been standing outside in the snow so she's cold. I realize it's "does she feel cold"?" and in the same case as "mir (dat.) ist es kalt" but I didn't immediately think that way... :-/
Watch out! To say that someone is cold in German with the nominative form (Ist unsere Großmutter kalt?) is an idiomatic expression. Unlike Engilsh, you wouldn't be asking whether she has a cold personality. It wouldn't even mean that she's cold from standing in the snow. Instead, you'd be asking, "Is our grandmother dead?"!
Using the nominative with temperature is always idiomatic in German. Using Opa as an example:
Der Opa ist kalt = The grandpa is dead.
Der Opa ist warm = The grandpa is gay (homosexual).
Der Opa ist heiß. = The grandpa is sexually aroused.
It should be "dem" in all of these cases in order to show that the environment is cold to the grandpa.
Wow! I really like the selection of the phrases by the owl. This one single sentence with your additional explanation teaches more than an ordinary "mir ist kalt" would had teached.
It is a real pity that the owl does not provide similar explanations by default, though... This time we were lucky to have you around here, because without your explanation we would have probably left this test confused and irritated and with the willingness to give up because it is all so hard to understand.
I had "Ist es unserer Großmutter kalt?" and it was rejected. "Ist unsere Großmutter kalt?" was the correct answer. However, that doesn't make sense because 1. it's not dative and 2. as Lana1204 said above, that would refer to her cold personality, not the state of her being physically cold.
Hmm maybe they've fixed it. I also just got rejected on "Ist es unserer Großmutter kalt?" but it now says the correct answer is "Ist unserer Großmutter kalt?" meaning it is dative but I was meant to leave the "es" as implied (damn it).