Mikä se on? vs. Mitä se on?

“Mikä se on?” or “Mitä se on?” – What’s the difference? The interrogatives ‘mitä’ and ‘mikä’ can be tough, but here’s a video that explains the choice between those two questions.
The Finnish partitive in sentences

Finish this sentence with an adjective: “Nukkuminen on …” Did you put it in the partitive case? You should! Read this post to find out more.
Akkusatiivi vai partitiivi?
Check out these example sentences to find out more about when to use the accusative or the partitive case.