Why do we know very little about the planet's first 600 million years? Why do we know only slightly
more about the early part of the Precambrian? What will be an ideal response?
No rocks are known for the first 600 million years of geologic time. Although there are rocks
beginning at 4.0 billion years, these rocks are difficult to decipher because they have been
metamorphosed and complexly deformed, they are buried beneath younger rocks, and they contain few
fossils useful for determining relative ages
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As Marie pushes a table to the right, friction between the floor and the table acts toward
A. the right. B. the left. C. right angles to her push. D. none of the above
Which statement best describes a compound?
A. a material that is made up of a single type of atom B. a mixture of more than one element C. a material that is made up of a combination of atoms bonded together D. a mixture of atoms E. none of the above
Bowen's reaction series explains the order of mineral formation with decreasing pressure
Indicate whether the statement is true or false
When do all locations on Earth experience equal lengths of day and night? Choose all that apply.
A) March Equinox B) June Solstice C) December Solstice D) September Equinox