"Is the spider eating the apple?"
Translation:Spiser edderkoppen æblet?
The order of words changes when it's a question. "Edderkoppen spiser et æble" would be "the spider is eating AN apple" while "Edderkoppen spiser æblet" tells you the spider is eating THE apple. The only thing you have to worry about is the -en or -et at the end of a noun, it tells you the gender which will tell you the article, and the order of words telling you if it's a question or a statement.