- Eritrea, which became the 182nd member of the UN in 1993, is in the continent of?
- How many hemispheres does earth have?
- Who measured the radius of earth first?
- What is the name of the central part of the earth?
- Earth Surface is divided into?
- The Hardest substance available on Earth is?
- Which continent has no desert?
- The first artificial satellite on earth is ______________?
- Which is the thinnest earth layer?
- When the Earth is closest to the Sun, it is called?
- Highest part of the earth is?
- Earth has an equatorial circumference?