When agriculture involves endless hours of backbreaking work is it called
A) subsistence.
B) peasant.
C) labor-intensive.
D) swidden.
E) none of the above
C
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Which of the following best describes ionic bonding?
A. one atom giving up some of its electrons to another atom B. two atoms exchanging a set of electrons C. two atoms sharing a set of electrons D. when two elements with same charge are held together by electrostatic forces E. none of the above
In the diagram below, the left arrow represents
A) elevation and the right arrow represents relief.
B) relief and the right arrow represents slope.
C) elevation and the right arrow represents depth.
D) relief and the right arrow represents elevation.
Which model builds new developments in the image of the kind of historical districts in older cities?
a) New urbanism b) Transition towns c) Industrial ecology d) All of the above
What physically breaks hydrogen bonds between water molecules as ice melts?
-covalent bonds of water molecules -movement of water molecules -mass of water molecules -polarity of water molecules