Multiple Choice
A meteorite is seen to impact upon Earth and is found to contain significant amounts of 26Mg, the stable decay product of radioactive 26Al. What conclusion can be drawn from this observation?
A) Radioactivity occurs naturally in normal matter and so this finding is not surprising.
B) An energetic nuclear event, possibly a supernova, occurred near the Sun and produced 26Al at about the time that this meteorite was formed.
C) The meteorite became so hot on its descent through Earth's atmosphere, that it became radioactive.
D) The meteorite had probably passed through radioactive clouds in space before hitting Earth.
Correct Answer:
Verified
Correct Answer:
Verified
Q7: The Kirkwood gaps are found in the:<br>A)equatorial
Q8: Which of the following descriptions would allow
Q9: Iron meteorites:<br>A)are normally composed almost entirely of
Q10: If an impact crater on Earth is
Q11: What is the approximate orbital period of
Q13: Why do most comets have very elliptical
Q14: The number of times that a typical
Q15: An iron meteorite, when cut open and
Q16: One example of a near-Earth object, or
Q17: What kind of orbits do the Trojan