How does an atom become a positive or a negative ion?
a) An atom becomes a positive ion by losing an electron; it becomes a negative ion by gaining an electron.
b) An atom becomes a positive ion by gaining a proton; it becomes a negative ion by losing a proton.
c)An atom becomes a positive ion by losing a neutron; it becomes a negative ion by gaining an electron.
d) An atom becomes a positive ion by gaining an electron; it becomes a negative ion by losing an electron.
e) An atom becomes a positive ion by gaining a proton; it becomes a negative ion by gaining an electron.
a) An atom becomes a positive ion by losing an electron; it becomes a negative ion by gaining an electron.
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Seed banks (institutions that store and preserve seeds) are important for ________
A) cash deposits for developing countries B) protecting genetic diversity C) protecting monoculture productivity D) loans to developing countries to promote organic agriculture E) providing farmers with the current year's GM crops
In a(n) ________ fault, the hanging wall block moves up with respect to the footwall block
A) reverse B) strike slip C) abnormal D) normal
Name an example of a place where intraplate earthquakes have occurred.
A. San Andreas fault seismic zone B. Indonesian seismic zone C. Kobe seismic zone D. New Madrid seismic zone
In the context of the three-cell model of the general circulation, the Ferrel cell is:
a. A circulation of rising air near the equator and sinking air in the sub- tropics. b. A circulation of rising air in subpolar latitudes and sinking air in the sub- tropics. c. A circulation of rising air in subpolar latitudes and sinking air in the polar regions. d. A circulation consisting of rising air in the western equatorial Pacific Ocean and sinking air in the eastern equatorial Pacific Ocean.