Antarctic Circle

The Tropic of Cancer is the parallel of roughly 23.5

Because it is a "polar" region, there is no precipitation, it has no lakes or rivers and is in fact the driest continent. Average temperatures in the Antarctic interior get down to -70 degrees Celsius during the winter months and -35 degrees Celsius in the warmer months. The coastal temperatures are much warmer with a range of -15 to -32 Celsius in Winter and -5 to +5 Celsius in Summer. The interior of Antarctica is considered the world's driest desert because the extreme cold freezes water vapor out of the air. Annual snowfall on the polar plateau is equivalent to less than 5 cm of rain. Antarctica has some of the strongest winds on earth, with some winds reaching 320 kph.

Only Antarctica reaches inside the antarctic circle.

About 12,440 miles.

The Antarctic Circle is south of the equator.
South
roughly 66.56 degrees south of it

The Arctic is around the northern hemisphere

The Antarctic is around the Southern Hemisphere (Antarctica)

Scientists and those who work in support of science live there temporarily: there are no permanent residents of Antarctica.
One hundred percent of the population of the Antarctic continent is temporary workers who are supported by their governments to study the health of planet earth. Generally, for each scientist, there are seven workers who support the scientific work.

None.

The few botanical specimens that can be found on the continent grow on the west side of a few areas on the Antarctic Peninsula.

They can grow, because there is sufficient sun, nutrient in the shallow, thawed soil and moisture to provide a nurturing growing environment for them.

None are part of any food chain.

It changes slightly every day, just like it does everywhere else on Earth.

On a single day, it could be anything between zero and 24 hours, depending

on the date, and exactly how far south of the Antarctic Circle you are. Over

the course of a whole year, it averages out to 12 hours for each day.

(Just like it does everywhere else on Earth.)

The Antarctic Circle crosses waters of the Southern Ocean, and land of Antarctica.
No point of it is on any part of any country, and there are no countries south of it,
between the circle and the south pole..

Twenty four hours is the length of any day on Earth.

Any land that the Antarctic Circle crosses is part of the Antarctic continent.

The Antarctic Circle is a circle of constant latitude, at roughly 23.5 degrees south.

The continent of Antarctica covers about 10% of the earth's surface. It is about as large as USA and Mexico, combined.

Both are theoretically the same. It depends on the accuracy of your measurements and the method of measurement. Are you measuring at exactly theoretical sea level or up and down mountains and valleys (along the sea floor?) etc. I do believer that the Earth is slightly larger south of the equator and so the Antarctic circle could be larger.

The equator is found at zero degrees and the South pole is found at 90 degrees S. You can measure this depending on the definition of nautical mile that you choose to use.

The closest point of Antarctic land to the equator is located at 69.5000° S.

Your math, then, will give you the answer you seek.

Due to the Antarctic Treaty, mining is prohibited. Iron ore, chromium, copper, gold, nickel, platinum and other minerals, and coal and hydrocarbons have been found in small, uncommercial quantities.

In summer it hovers just above zero. In winter it can drop to 40 degrees below zero.

In terms of Latitude, the arctic is the region above the arctic is the region north of 77 degrees north

Mercury freezes or at least does not expand and contract at the calculated rate under arctic conditions. I.E., the expansion coefficient of mercury does not allow it to operate at that extreme temperature so as to give accurate results.

The Arctic is north

There are none because nobody lives there except for a few scientists studying the ice.