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Rus_ich [418]
3 years ago
5

Why have we not drilled or mined deeper into earth ??

Chemistry
1 answer:
alexdok [17]3 years ago
8 0
<span>Scientists have determined that the center of the earth is 6371 km below the surface. But how has this been determined? Many people might answer that question by saying scientists can drill into the Earth with machines. However, the drilling rigs that scientists use can only drill about 20 km in the Earth which is not very deep! In other words, we can only drill into upper part of the crust of the earth. Extremely high temperatures and pressures within the Earth make drilling into it very difficult</span>
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HELIUM) has chemical properties so different from those of the other elements that it cannot be placed in any group. *
siniylev [52]

Answer:

jesus

Explanation:

jesus is always the answer

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3 years ago
Which piece of the planetary object data could be used to decide if there actually is a solid surface to land on?
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Planetary surfaces and surface life are of particular interest to humans as it is the primary habitat of the species, which has evolved to move over land and breathe air. Human space exploration and space colonization therefore focuses heavily on them. Humans have only directly explored the surface of Earth and the Moon. The vast distances and complexities of space makes direct exploration of even near-Earth objects dangerous and expensive. As such, all other exploration has been indirect via space probes.

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3 0
2 years ago
Please let me know if this is correct?
siniylev [52]

Answer: Yes! you're all good. Alkali metals in group 1 are the most metallic :)

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