Last time we made basic statements using นี่ อะไร, which means what is this? You'll need to understand and use another form of asking what something is, using the verb เรียกว่า (rîak-wâa).
In casual conversations you will hear both of these phrases, so you'll need to recognize them and understand the difference:
To answer either question, just replace the word อะไร (à-rai) with the noun. Until you get more practice, try to answer using เรียกว่า (rîak-wâa) if the question uses it, but it's fine to use either form. You will be understood.