The planet is onion like with an inner core then an outer core a mantle which

The planet is onion like with an inner core then an

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different, still-denser material, because the planet is made of concentric layers, sort of like an onion.  The planet is onion-like, with an inner core, then an outer core, a mantle (which has several sub-layers),  and a crust. The core is waaaaay too hot and high-pressure for Diet Pepsi.  Points Earned: , 1/1 Correct Answer: , E Your Response: , E 8. , The scientific study of the origin of the planet has taken a lot of effort, and still generates much discord  outside the scientific community although almost no discord within the scientific community. The  scientifically accepted history is: A. , The Earth formed from older materials that fell together under gravity about 6000 years ago. B. , The Earth formed three minutes after the Big Bang, as the cosmic microwave background radiation  cooled off, about 14 billion years ago, as chronicled in Steven Weinberg’s famous book “The First Three  Minutes”.  C. , The Earth was formed from the deep-space wind, generated by the gas-passing activities of giant  space marmots, about 4.6 billion years ago.  D. , The Earth formed from older materials that fell together under gravity about 4.6 billion years ago. E. , The Earth formed in the Big Bang about 6000 years ago. The Big Bang is estimated as having occurred about 14 billion years ago. Stars that eventually formed in  the wake of the Big Bang led to production of elements such as iron and silicon that are common in the 
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Earth—we are formed from second-generation stardust, which “got it together” to make the planet about  4.6 billion years ago.  Points Earned: , 1/1 Correct Answer: , D Your Response: , D 9. , National Parks are: A. , Regions containing key geological resources that have been set aside for the enjoyment of future  generations. B. , Regions containing key bumper-cars games that have been set aside for the enjoyment of the current  presidential administration.  C. , Regions containing key biological resources that have been set aside for the enjoyment of the present  generation. D. , Regions containing key cultural resources that have been set aside for the enjoyment of the present  generation. E. , Regions containing key biological, geological or cultural resources that have been set aside for the  enjoyment of the present generation and future generations. Old Faithful, the giant sequoias, and Mesa Verde’s cliff dwellings are waiting for you, and your  grandchildren. Points Earned: , 1/1 Correct Answer: , E Your Response: , E 10. , In chemistry, the type of an atom (what element it is) is determined by: A. , The number of protons it has in a cloud around the nucleus.
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