Name _________________________________________ Date ______________ Class section _______
Chapter 18: A View of the Earth’s Past
Earth Science
18 pts.
Section 18.2: Geologic History
(p. 347-359)
Short answer (from your text, p.347 or notes):
1. List the 4 basic principles of evolution proposed by Charles Darwin. (2 points each)
a. ______________________________________________________________________________
b. ______________________________________________________________________________
c. ______________________________________________________________________________
d. ______________________________________________________________________________
Matching: Identify the Period for each of the following descriptions.
(See Table p. 354)
_____ 1. Dinosaurs became the dominant life-form
_____ 2. Ended with the extinction of 95% of all life on earth
a. The Cenozoic Era
_____ 3. This era is commonly given the name The Age of Mammals
b. The Mesozoic Era
_____ 4. Amphibians flourish
c. The Paleozoic Era
_____ 5. Extinction of all the trilobites
_____ 6. The first flowering plants appear
Multiple choice: Choose the one best response. Write the letter of that choice in the space provided.
_____7. The most common fossils found in Precambrian rocks are ___.
a. graptolites
b. trilobites
c. eurypterids
_____ 8. Precambrian time ended about ___.
a. 4.6 billion years ago
b. 540 million years ago
d. stromatolites
c. 65 million years ago
d. 25 thousand years ago
_____ 9. There is a gap in Illinois’ geologic record from the Mesozoic to the Pleistocene, due to ___.
a. glacial movement
c. human mining activity
See Notes
b. the formation of an inland sea
d. tectonic activity
_____10. Present day is the ___ Epoch, beginning at the end of the Ice Age, nearly 12,000 years ago.
a. Pliocene
b. Holocene
c. Eocene
d. Pliestocene