When did large numbers of fossils first appear in the geologic record?
A. About 500 million years ago
B. About 5 billion years ago
C. About 5000 years ago
Answer: A
You might also like to view...
In the map below, green represents
A) subtropical scrub and woodland.
B) desert.
C) rain forest.
D) grassland.
Which of the following is not a reason that the tracer material was found at varying concentrations?
A) impermeability of materials B) varying pore sizes C) varying circuitous routes of water molecules D) spreading out over a large volume of water
Burma recently instituted political reforms including:
A) deposing their king B) a new constitution C) assassinating their military leaders D) releasing foreign hostages
What is the main geologic feature for which Siccar Point in Scotland is famous?
A. a boundary between steep gray layers below and gently dipping red layer above B. an ancient erosion surface C. an unconformity D. All of these choices are correct. E. None of these choices are correct.