Everything else being equal, more effusive eruptions will occur in molten rock material of:
a. higher gas content.
b. higher viscosity.
c. cooler temperatures.
d. more mafic composition.
e. rhyolitic composition.
D
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Each of the following is a mechanisms responsible for moving lymph through lymphatic vessels, except ________.
a. thoracic pressure changes b. mediastinum pressure changes c. contraction of skeletal muscles d. contraction of lymphatic vessels
Tides of large amplitude occurring every two weeks at the new and full moon are called ________ tides.
A. semidiurnal B. neap C. spring D. equatorial E. declinational
Linear, magnetic patterns associated with mid-ocean ridges are configured as ________
A) concentric circles about a rising plume of hot, mantle rocks and magma B) normal and reversed magnetized strips roughly perpendicular to the ridge axis C) reversed magnetizations along the rift valleys and normal magnetizations on the ridge D) normal and reversed magnetized strips roughly parallel to the ridge
What is the mass number of an atom which is made up of 38 protons, 52 neutrons and 38 electrons?
A) 38 B) 52 C) 90 D) 128