Salutations! :)
<span>The chain of volcanoes that forms at an ocean-ocean convergent plate boundary is referred to as a(n) ___________ arc.
</span><span>The chain of volcanoes that forms at an ocean-ocean convergent plate boundary is referred to as a(n) island arc.
Hope I helped!
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Yes africa si south of anartica
Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
Grain farming is done for economic activity and this makes it commercial. It is highly specialized and mechanised. The yield per acre is low so the farms are big. The yield is high per man so little manpower is needed for production. Grain farming is subject to market conditions like climate.
