Okay, these are my last questions of the day....
1. After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record?
an earthquake or motion along a fault
new deposits of sediment must build up on the eroded area
folding of sedimentary rock layers
a volcanic eruption
2. If you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?
in the section for the Ordovician period of the Paleozoic era
in the section for the Quaternary period of the Cenozoic era
in the section for the Triassic period of the Mesozoic era
in the section for Precambrian time
3. Earth’s atmosphere, oceans, and continents began to form during the first several hundred million years of
Precambrian time.
the Paleozoic era.
the Mesozoic era.
the Cenozoic era.
4. During the Devonian period, animals that could live on land began to evolve. These animals still spent part of their lives in the water. What were these animals called?
trilobites
reptiles
amphibians
dinosaurs
5. Which of the following events occurred during the Mesozoic era?
Dinosaurs became common on land.
Whales and dolphins evolved in the oceans.
Flowering plants flourished.
The supercontinent Pangaea formed.
My answers:
1.B
2.?
3.?
4.c
5.A
9 answers
1. is C the folding of sedentary layers.
You're right on 4. and 5.
2)C
3)A
4)C
5)A
They are all right