Earth's geosphere contains 99.94% of its mass. Hope this helps!
Mantle, inner Core, Crust, outer core.
Answer:
Astatine and chlorine are halogens only
Nitrogen and sulphur are non metals only
Krypton (Kr) is noble gas only
Answer: They existed for a short span of time.
Explanation:
Index fossils are also referred to as the indicator fossils and they are simply used to define the faunal stages.
Some of the characteristics possessed by the index fossils include:
• geographic distribution that's wide
• short vertical range
• rapid evolutionary trends.
There is mostly plains in the US
