Currently, the strongest evidence for microfossils dates to approximately
A) 4.0 billion years ago
B) 3.5 billion years ago
C) 3.4 billion years ago
D) 3.9 billion years ago
C
You might also like to view...
Briefly discuss the rotation curve method, which is used for measuring the mass of a galaxy
What will be an ideal response?
The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:
A. 200 K B. 300 K C. 400 K D. 450 K E. 600 K
A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal
(a) What is the efficiency of this engine? (b) How much work does this engine do per cycle? What will be an ideal response?
Common erosional shoreline features include sea stacks,
A) beaches, and barrier islands. B) wave-cut platforms, sea caves, and sea arches. C) sea caves, sea arches, and atolls. D) wave-cut platforms, sea caves, and sea spits.