This figure shows ages of seafloor. Which of the numbered sites is on the deepest seafloor, based on its position?
A. 1
B. 2
C. 3
D. 4
Answer: A
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Why is the oldest continental crust (4.4 billion years) so much older than the oldest oceanic crust (180 million years)?
What will be an ideal response?
Clouds owe their existence to the presence of water vapor and atmospheric ________
A) particles B) oxygen C) argon D) sunlight E) carbon dioxide
The Coriolis effect is caused by:
a. wind shear between water and the atmosphere. b. the axial tilt of the Earth. c. the rotation of the Earth. d. differences in air pressure in different regions. e. Milankovitch cycles
Which of the following represents an abiotic component of a forest community?
A) The oak and hickory trees B) The mushrooms growing on and around rotting logs C) Water trickling in a small stream D) Bacteria in the soil