QUESTION 33 Elevated levels of iridium are found in the geologic layer at the K–
ID: 121168 • Letter: Q
Question
QUESTION 33
Elevated levels of iridium are found in the geologic layer at the K–Pg boundary. Is this unusual?
Yes. Composition differences between geological layers tend to equilibrate over time.
Yes. Iridium is a common metal on Earth but rarely accumulates in a single layer.
No. Iridium is a rare element on Earth, but geological layers of iridium are not uncommon.
Yes. Iridium is a rare metal on Earth.
a.Yes. Composition differences between geological layers tend to equilibrate over time.
b.Yes. Iridium is a common metal on Earth but rarely accumulates in a single layer.
c.No. Iridium is a rare element on Earth, but geological layers of iridium are not uncommon.
d.Yes. Iridium is a rare metal on Earth.
Explanation / Answer
The answer is d
Yes, because Iridium is a very rare metal and is not available in required amounts anywhere.The statement states that elevated levels of it are found, so it is highly unusual.