Systems encountered in nature at Earth's surface, such as a forest, are
A) closed systems in terms of energy.
B) open systems in terms of matter.
C) open systems in terms of energy.
D) both open systems in terms of energy and open systems in terms of matter.
E) both closed systems in terms of energy and open systems in terms of matter.
D
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Surrounding a moving electron is
A. an electric field. B. a magnetic field. C. both of these D. neither of these
What are the north-south length and east-west width of K?lauea Crater?
in miles: in kilometers:
Which coastal state contributes the most to exploitable marine sand and gravel?
a. Texas b. Alaska c. Oregon d. Florida e. South Carolina
On the map below, all of the following would be considered "interpretations" except
A. porcupine caribou herd range. B. spring migration routes. C. concentrated calving areas. D. Ivvavic National Park.