None.
Earth is a planet. The countries are on Earth.
Egypt was not the first country on the earth Iraq was the first country
The centre of the earth is not a country it is called the core, made chiefly from iron.
There is no country on the Antarctic continent, and yes, it is the coldest continent on earth.
The smallest country on earth is The Vatican, with only 121 acres of land.
Jordan is not the poorest country on Earth.
There is no "Best" Country on earth.
No country is directly in the middle of the earth. The center of the earth is made up of molten iron and nickel about 6,400 kilometers beneath the Earth's surface.
Every single country on earth has telephones.
Russia is the largest country by area on earth.
china
if your talking about country as in "The United States is a country in on Earth" you would spell it countries. as in "there are many countries on earth."
Tokyo in Japan is the largest country in population on Earth. It has a whopping 37.8 million people - around a quarter of the country's population.