Hi there,
I hope you and your family are staying safe and healthy!
Panthalassa was the name of the single world ocean that surrounded pangaea, which is in today's world called the Pacific Ocean.
Happy to help!
Garebear
I think the answer is Alps.
Answer:
The crust is the thinnest layer and what we live on.
The mantle is the biggest layer
The outer core is the only liquid layer
The inner core is the hottest layer
I think it's Newfoundland