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:

Take the temperature readings on the hour for a 24-hour period. Add the hourly readings together, then divide that number by 24 to get the mean daily temperature.
hope helpful~
Answer:
1. arid
2. semiarid
3. Mediterranean
Explanation:
The Southwestern states of Arizona and New Mexico are characterized by the following climates arid, semi-arid and Mediterranean.
This is evident where arid to semi-arid climates are found in places like Nevada, Arizona, West Texas, and the and so on where there are desert lands and mountains.
The Mediterranean climates in the region of southwestern are found in places like Wyoming, where there is a form of desert land but capable of experiencing high cold temperatures at night during winter.
External critiques of Africa's problems highlighted four areas of action. It includes the <span>Improved governance and conflict resolution. The answer is letter B. The rest of the choices do not answer the question above.</span>
Answer:
Becoming cleaner comes with an increased cost of electricity. According to this graphic the increase in the UK annual cost of energy between 2007 and 2015 for an average house was 37%
Explanation:
According to the graph, the average yearly cost of energy in the average UK household in 2007 was £954, or around $1239 USD, and it rose to £1311, or around $1703 USD in 2015. So, the energy bill increase on average by £357 or around $464 USD, which represents an increase of 37%.
£954 = 100%
£357 = X
X= £357 * 100% / £954
X = 37.42 %
The average monthly bill will then be around £109, or $142 USD, which, compared to the US, it is slightly more expensive (21% more expensive), since according to the US Energy Information Administration, the average monthly electric bill for an average house in 2017 was $111 USD.