What is the formula of the compound formed by potassium and chlorine?
A) KCl
B) KCl2
C) KCl3
D) K2Cl
A
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What has been one consequence of desertification?
A)The rate of global warming is accelerating. B)There are more droughts. C)Environmental refugees have a greater area to settle. D)Croplands and rangelands are less productive. E)The Sahara is no longer a fertile savanna.
A hurricane watch is issued when
A) hurricane conditions are possible for a particular coastal region. B) hurricane conditions are expected for a particular coastal region. C) hurricane conditions are possible for a particular oceanic region. D) hurricane conditions are expected for a particular oceanic region.
The problems encountered with lenses caused this scientist to build reflecting telescopes of his own design
A) Niels Bohr B) Albert Einstein C) Sir Isaac Newton D) George Hale E) Galileo
________ is a naturally occurring substance that is potentially toxic to people
A) Carbon dioxide B) Radon C) DDE D) PCB E) Bisphenol A (BPA)