What unusual discovery was made about the Murchison Meteorite?
A) It is from Mars.
B) It contains iron.
C) It contains living cells.
D) It contains amino acids.
E) It is the largest known meteorite.
D
Physics & Space Science
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As a person holding her breath swims deeper and deeper in a lake, her density
A) increases. B) decreases. C) remains the same.
Physics & Space Science
The dark lines in the Sun's spectrum are due to light that is
A) absorbed by the Sun's atmosphere. B) emitted by the Sun. C) reflected by the Sun. D) none of the above
Physics & Space Science
The centers of stars are many millions of degrees cooler than their surfaces
Indicate whether the statement is true or false
Physics & Space Science
Which of the following stars will certainly end its life in a supernova?
A) the Sun B) a red giant star C) a 10-solar-mass star D) a neutron star
Physics & Space Science