Is this the song?
I really like the questioning the alien (teacher) – what a great way to use the questions and to rephrase as needed in the light of information that the teacher provides.
Connecting to science understanding by creating the full persona is super – and some children might work together to create an alien ecosystem. I sometimes do that with children who find the creating aspect challenging and have created “rocks” or lumps — I suggest that these are very well disguised aliens – they look like lumps if anyone else is around…!