Multiple Choice
To date the age of Earth,we look for rocks with a high percentage of
A) uranium-235 to lead-207.
B) uranium-238 to lead-206.
C) potassium-40 to argon-40.
Correct Answer:
Verified
Correct Answer:
Verified
Q93: The oldest known fossils of single-celled organisms
Q94: The "Cambrian explosion" refers to the<br>A)great many
Q95: The principle of faunal succession states that<br>A)fossil
Q96: Dinosaurs were abundant during the<br>A)Paleozoic era.<br>B)Devonian era.<br>C)Mesozoic
Q97: The San Andreas Fault was created<br>A)during the
Q99: The Andes and the Sierra Nevada Mountains
Q100: Similar reptiles were present on all continents
Q101: Fossils are found in<br>A)sedimentary rocks.<br>B)metamorphic rock.<br>C)igneous rocks.<br>D)sedimentary
Q102: A radiometric date is determined from mica
Q103: Earth's early life forms were marine organisms.Life