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
@Sam why are you on here then? Just saying.
Yeah I agree with@Sarah but I am not trying to be mean I am just agreeing so don't take it the wrong way.
4, is not B, it is c. If you just look up the definition of amphibians on google, you will know.
i sure hope this is correct
I hope so too!!!
I hope its correct!
Vanessa Skellington
There wrong
1. After a rock layer is eroded, the additional event that must occur to create an unconformity, or a gap in the geologic record, is the deposition of new sediment on the eroded area. This means that new layers of rock need to build up on top of the eroded surface.
2. To consult the geologic time scale for when the first vertebrates evolved, you would look in the section for the Ordovician period of the Paleozoic era. The Ordovician period, which occurred between approximately 485 and 443 million years ago, marked the emergence of the first vertebrates.
3. Earth's atmosphere, oceans, and continents began to form during the first several hundred million years of Precambrian time. Precambrian time is the longest and oldest span of Earth's geological history, which encompasses everything before the Paleozoic era.
4. During the Devonian period, animals that could live on land began to evolve, but still spent part of their lives in the water. These animals are called amphibians. Amphibians were the first vertebrates to colonize land and were a transitional group between aquatic fish and fully terrestrial animals.
5. Several events occurred during the Mesozoic era. Dinosaurs became common on land, which is represented by the dinosaurs being the dominant land animals during this era. However, flowering plants evolved and flourished during the Cretaceous period of the Mesozoic era. The supercontinent Pangaea also formed during the late Paleozoic era, before the Mesozoic era began. So, the correct answer would be A.
1 is correct
2 is A
3 is D
4 is B
5 is A
I checked all of these on google