What is a sea?
A) A semi-enclosed body of water
B) An area where irregular waves peak due to wind
C) A group of waves separated by wavelength
D) None of these choices
D
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The most common measure of density, the number of people per area of land, is known as ________ density
A) arithmetic B) physiological C) mathematic D) geometric E) agricultural
Lime, CaO, is insoluble in water. In which of the following materials will it dissolve?
A) HCl(aq) B) NaOH(aq) C) Ca(OH)2(aq) D) none of these
The _______________ system divides compass directions into four quadrant of 90° (N, E, S, W), each numbered by directions in degrees away from either north or south
Fill in the blank(s) with correct word
The most serious threat to coral reefs are ________
A) floods B) humans C) hurricanes D) sea stars E) tsunami