A rock that is 400 million years old comes from the ________ Period

A) Paleozoic
B) Phanerozoic
C) Precambrian
D) Silurian


Answer: D

Environmental & Atmospheric Sciences

You might also like to view...

Nanotechnology and microtechnology are similar in that they both

A. have huge impacts on society. B. are interdisciplinary. C. are relatively new technologies. D. all of the above

Environmental & Atmospheric Sciences

Determine if the phrase in bold applies to only volcanic rocks, only plutonic rocks, both types of rocks or neither type of rock. Contains minerals

A. Both volcanic and plutonic igneous rocks B. Only plutonic igneous rocks C. Only volcanic igneous rocks D. Neither volcanic or plutonic igneous rocks

Environmental & Atmospheric Sciences

Why is it common to use two different concepts—nation and state—to describe political entities?

What will be an ideal response?

Environmental & Atmospheric Sciences

Extrusive igeneous cooled and hardened ________ the Earth's surface, resulting in ________ grained rocks

A) beneath; finer B) beneath; coarser C) at; finer D) at; coarser

Environmental & Atmospheric Sciences