What is the one piece of evidence that suggests that the dinosaurs were made extinct by the impact of an asteroid 65 million years ago?
A) the crater from this impact can still be seen in the deserts of Arizona
B) a layer of sediment laid down at that time contains grains of shocked quartz, solidified rock droplets, and soot from global wildfires
C) a layer of sediment laid down at that time is littered with dinosaur fossils
D) dinosaur fossils are found in rock layers older than 65 million years but not younger than 65 million years
Question 2
Given 1 angstrom unit = 10-10 m and 1 fermi = 10-15 m , what is the relationship between these units?
A) 1 angstrom = 10+5 fermi
B) 1 angstrom = 10-5 fermi
C) 1 angstrom = 10-25 fermi
D) 1 angstrom = 10+25 fermi
E) none of the given answers
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