A fossil imprint made by the movement of an animal is called a(n) ______________ fossil
Fill in the blank(s) with correct word
trace
Physics & Space Science
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Which of the following two stick structures are different conformations of the same molecule?
A) a and c B) b and c C) a and d D) b and d E) none of the above
Physics & Space Science
All fission bombs are based on
A) uranium. B) either uranium or plutonium or both. C) isotopes of hydrogen. D) either isotopes of hydrogen or uranium or both. E) laughing gas.
Physics & Space Science
An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)
Fill in the blank(s) with correct word
Physics & Space Science
For nearby spirals, their rotation curves help measure both light and dark matter
Indicate whether the statement is true or false
Physics & Space Science