1. evaporation because in the water cycle the water turns to water vapor during evaporation
The world's tallest artificial structure is the 829.8-meter-tall (2,722 ft) Burj Khalifa<span> in Dubai. The building gained the official title of "Tallest Building in the World" and the tallest self-supported structure at its opening on January 9, 2010.</span>
The nation of Egypt is the most densely populated nation in the Arab world. The country of Egypt is officially known as Arab Republic of Egypt. The country of Egypt is basically a Mediterranean country.Egypt has a very old history and is also considered as the cradle of civilization. I hope the answer helps you.
4.6 billion years ago - most likely hydrogen (H2) and helium (He)
probably rich in hydrogen compounds like methane (CH4), ammonia (NH3), hydrogen cyanide (HCN), water (H2O), and formaldehyde (HCHO). Also some N2, CO2 but LITTLE or NO free oxygen.
Molecules of H2 and He move really fast, especially when warm, that they eventually all escaped Earth's gravity and drifted off into space.
I am not certain but I think it is numbers