the outer crust isnt made of iron and nickle because thats what we are living and walking on.
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This Should Help a Little:
A largely semi-arid belt of barren, sandy and rock-strewn land, the Sahel marks the physical and cultural transition between the continent's more fertile tropical regions to the south and its desert in the north. ... The Sahel also suffers from ethno-religious tensions, political instability, poverty and natural disasters.
Answer: <u>A metal </u>is rare on Earth but relatively abundant in iron-rich meteorites. It has been found in widespread layers on Earth and it's date of deposition coincides with the major extinction of life on Earth 65 million years ago, possibly indicating a connection between a large impact and this extinction.
Explanation: That metal would be iridium
Answer:
South America is a continent.
Asia is a continent.
Cuba is not a continent.
Barbados is not a continent.
Europe is a continent.
Iceland is not a continent.
Africa is a continent.
Sri Lanka is not a continent.
Madagascar is not a continent.
Australia is a continent.