Scientists live in a heated tent
Scientists working in a research station sleep in dormitories and eat in cafeterias. Scientists working in field camps sleep in tents and eat in mess tents.
Scientists who work and live in Antarctica temporarily sleep in dorms or tents, eat in cafeterias or cafe tents and work in work spaces or in the field, depending on the nature of their investigation.
Scientists do not live in houses in Antarctica. Scientists sleep in dorms and eat in dining halls at the research station, and may spent their non-working time in field tents away from the research station.
You would sleep in a base (if you work there) or in a tent, which is cold.
Scientists working in Antarctica study the health of planet earth.
Antarctica is used by scientists by way of their governments.
You'll find both there. Some scientists ski, and there is some cross-country skiing in Antarctica. Some cross-country skiers in Antarctica are not scientists.
Yes.
Scientists and explorers.
Tourists are allowed in Antarctica, as are the people who live and work there temporarily -- in support of science.
Penguins sleep on ice, either on Antarctica's beaches where they breed, or on ice floes in open water.
No, there are no nations living in Antarctica. There are only scientists living there to get information.