In terms of matter and resources, the Earth is essentially a(n) ________ system; In terms of energy, the Earth is a(n) ________ system
A) closed; closed
B) closed; open
C) open; open
D) open; closed
B
You might also like to view...
In a conditionally unstable atmosphere: a. both saturated and unsaturated air parcels are unstable
b. saturated air parcels are stable and unsaturated parcels are unstable. c. saturated air parcels are unstable and unsaturated parcels are stable. d. None of these choices.
Obtaining images of an area from a distant place is called
a. global sensing (GS). b. remote sensing (RS). c. random sensing (RNS). d. radon sensing (RDS). e. Mapping.
There is one accepted system of coastal classification and it is based on plate tectonics
Indicate whether the statement is true or false
A caldera collapse occurs ________.
A. in the middle of the eruption B. before the eruption starts C. at the onset of Vulcanian activity D. millions of years after the volcano's final dying eruption E. after the magma chamber is mostly empty