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NYS Regents

NEW YORK STATE REGENTS EXAMS
PHYSICAL SETTING / EARTH SCIENCE - JANUARY 2004

16 Fossil pollen has been recovered from sediments deposited in
late-Pleistocene lakes. The pollen’s geologic age can most accurately
be  measured by using

(1) rubidium-87       (3) oxygen-18
(2) potassium-40     (4) carbon-14

17 Andrija Mohorovic  discovered the interface between the crust
and the mantle that is now named for him. His discovery of the
“Moho” was based on analysis of

(1) landscape boundaries
(2) continental coastlines
(3) erosional surfaces
(4) seismic waves

18 Which phrase best describes coal?

(1) low density, mafic
(2) chemical precipitate
(3) organic plant remains
(4) glassy texture, volcanic

19 Which mineral will scratch glass (hardness = 5.5), but not pyrite?

(1) gypsum    (3) orthoclase
(2) fluorite     (4) quartz

20 The observed difference in density between continental crust and
oceanic crust is most likely due to differences in their

(1) composition     (3) porosity
(2) thickness          (4) rate of cooling

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