How many time zones are shared by the 48 conterminous U.S. states and the Canadian provinces?
A) 3
B) 4
C) 5
D) 6
Answer: B
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Which of the following igneous rocks has a texture consistent with a magma that cooled and solidified slowly at first, followed by more rapid cooling?
A. small mafic crystals enclosed in large felsic ones B. large, early formed crystals surrounded by smaller, late formed crystals C. small felsic crystals enclosed in large mafic ones D. large crystals like those in pegmatite
Which of the following best matches the description?Molecule or atom which has lost or gained an electron.
A. pH B. potential energy C. base D. nucleus E. combustion F. neutron G. ion H. acid I. entropy J. proton K. kinetic energy L. photosynthesis M. isotope N. enzyme O. electron P. latent heat Q. respiration
Changes in the orientation of Earth's axis over a 26,000-year cycle is known as
A) eccentricity. B) obliquity. C) precession. D) inclination.
One way in which concentrations of CO2 millions of years ago can be reconstructed is from the density of stomata in fossilized leaves.
Answer the following statement true (T) or false (F)