The justification hypothesis that the early Earth environment was void of oxygen is:
- atmosphere lacked oxygen but abundant in methane, ammonia, water vapour, noble gas, neon etc.
<h3>What did scientist proved about oxygen-less earth?</h3>
Studies revealed that the Earth's atmosphere was devoid of oxygen before more than 2.4 billion years ago.
However, some scientist proved that oxygen get brewing in the atmosphere from the oceans where a cyanobacterial photosynthesis occurred for about as 3 billion years ago.
Read more about Earth environment
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Answer:
In Pakistan, barani areas are those that primarily lack access to water for crop and livestock production, resulting in lower and uncertain crop yields and livestock productivity. Such areas typically have high levels of poverty.
Answer: Johannesburg
Explanation: Abuja is the capital of Nigeria, Kinshasa the capital of DRC(Democratic Republic of the Congo), Cairo is the capital of Egypt. Johannesburg is South Africa’s biggest city but not capital, South Africa is one of the only countries in the world, that has more than 1 capital, South Africa’s capitals are Cape Town, Pretoria, & Bloemfontein.
A modern seismograph generally consists of three sensing devices
The correct answer is B. The Bristol Glacier is older than the Camden Glacier.
Explanation
The formation of glaciers has three stages. The first is the accumulation in which the snow falls in one place and accumulates there and forms the glacier. The second is compaction in which new layers of snow accumulate on top of the first ones, compacting the lower layers. The third is crystallization in which pressure and air cause snow to crystallize into glacial ice. Therefore, the age of a glacier can be known by its length, the older is the longer glacier. According to the above, if the length of the Bristol Glacier is greater than that of the Camden Glacier, it is because it is older. Then the correct answer is B.
