Question about the tundra? 10 pts to best answer!?

Question

i was learning about the biomes in science and my teacher said that the tundra had "thermafrost" what is it ?

Answer 1

always frozen

Answer 2

i think she meant permafrost. Permafrost is basically just soil that is frozen year round. It must remain frozen for 2 years before it is considered permafrost.

Answer 3

Thermafrost is a DC comic character.

Perhaps he meant to say:  

per·ma·frost:  Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.