Multiple Choice
Which statement is true?
A) Radioisotope dating of rocks, combined with fossil analysis, is the most powerful method of determining geological age.
B) Earth's magnetic field never changes.
C) Scientists divide geological periods into eras.
D) In order to date igneous rocks, geologists search for locations where sedimentary rocks have intruded into igneous rocks.
E) Radioisotope dating can only be performed on fossils.
Correct Answer:

Verified
Correct Answer:
Verified
Q146: Based on the results of experiments raising
Q147: At very small population densities, local extinctions
Q148: If 50 mg of a radioactive substance
Q149: Among terrestrial species, those adapted to _
Q150: You have discovered a nonavian dinosaur fossil
Q152: The Ottawa-Bonnechere Graben is a region in
Q153: One billion years ago, Earth was in
Q154: Refer to the figure. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5650/.jpg" alt="Refer
Q155: The Cenozoic era began about _ years
Q156: Refer to the figure, which illustrates changes