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.
Answer: The atmosphere today contains more greenhouse gas molecules, so more of the energy emitted by the surface ends up being absorbed by the atmosphere. Since some of the extra energy from a warmer atmosphere radiates back down to the surface, The Earth's surface temperature rises.
Longitudes are the imaginary<span> circles that goes between the </span>North and South<span> Poles, and the Equator. Half of this circle is known as a Meridian. these are perpendicular to every </span>latitude. The Prime Meridian is set as 0° longitude and it divides the Earth into<span> the Eastern and the Western Hemisphere.</span>
D. the concept of sequent occupance, its the one that fits the most, hope it helps, good luck :)
