Imagine two magmas that are identical in all respects (for example, same chemistry, pressure, volume) except that one magma is hotter than the other. Which magma will have the higher viscosity?
A. The cooler magma will be more viscous.
B. The hotter magma will be more viscous.
C. The magmas will have the same viscosity.
D. There is not sufficient information to establish the relative viscosities of these magmas.
E. Temperature does not affect magma viscosity.
Answer: A
You might also like to view...
Why are ancient impact craters difficult to identify on Earth?
A) they typically have been eroded or infilled with younger sediments B) impact craters on Earth are smaller than those on the Moon or Mars C) they typically lack shock metamorphic minerals D) there have been very few meteorite impacts on Earth
Which of the following takes place in cycles much longer than the time taken by an El Niño event?
A) Arctic oscillation B) North Atlantic oscillation C) Pacific decadal oscillation D) La Niña E) The greenhouse effect
What is the deadliest tornado on record in the United States?
A) the Tri-State tornado of 1925 B) the Fargo, ND tornado of 1957 C) the Moore, OK tornado of 1999 D) the Natchez tornado of 1840
Hard water is caused by the presence of:
a. calcium and sodium b. calcium and magnesium c. sodium and magnesium d. sodium and sulfate