Stromatolites are structures created by
a. algae.
b. brachiopods.
c. sea worms.
d. trilobites.
[Ques. 2] Archaeopteryx fossils are those of a prehistoric
a. bird.
b. crinoid.
c. trilobite.
d. ground sloth.
[Ques. 3] The K-T impact is thought to have occurred at what site?
a. Iridium
b. Chicxulub
c. Gubbio
d. Alvarez
[Ques. 4] Which occurrence is associated with the demise of the dinosaurs?
a. The Great Dying
b. The Cambrian explosion
c. The breakup of Pangaea
d. The K-T event
[Ques. 5] The oldest known fossils of the genus Homo date from about how long ago?
a. 6000 years
b. 2 million years
c. 10,000 years
d. 65,000 years
[Ques. 6] About how long ago was the last retreat of the glaciers from North America and Europe?
a. 60,000 years
b. 10,000 years
c. 2 million years
d. 6000 years
[Ques. 7] Consider two charged spheres, one with charge +2 C and the other with -2 C. A proton (a positively charged particle) is at the point halfway between the spheres. What is not zero?
a. the potential energy of the proton
b. the work to move the proton from infinity to that point
c. the force on the proton
d. all of the three above are zero
[Ques. 8] Which epoch is also called the Ice Ages?
a. Permian
b. Holocene
c. Pleistocene
d. Cretaceous
[Ques. 9] The Holocene epoch began when
a. the glaciers last retreated from North America.
b. a period of intense volcanic activity ended.
c. an asteroid hit Chicxulub.
d. Pangaea began breaking up.
[Ques. 10] We live in the epoch called the
a. Quaternary.
b. Ordovician.
c. Holocene.
d. Cenozoic.
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