Which two factors are most important to the existence of plate tectonics on Earth?
A) oxygen in the atmosphere and mantle convection
B) Earth's liquid outer core and solid inner core
C) the existence of life and oxygen in the atmosphere
D) mantle convection and a thin lithosphere
D
You might also like to view...
General Relativity is Einstein's theory of ________
Fill in the blank(s) with correct word
You can raise the temperature of an object with
A. microwaves. B. infrared waves. C. ultraviolet rays. D. all of the above. E. only (a) and (b) above.
A transformer has a turns ratio of 10. The primary voltage and current are 120. volts and 20. Amperes. (a) What is the primary impedance (ratio of primary voltage to current)? (b) What is the secondary impedance?
What will be an ideal response?
The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from the
a. Lyman series. b. Balmer series. c. Paschen series. d. isotopes of hydrogen. e. ions of hydrogen.