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WorksheetsTheories that the Earth has evolved
Total questions: 16
Worksheet time: 14mins
What was Pangaea? When did it form and when did it break apart?
It was a large ocean basin that opened in the Triassic and closed in the Paleocene
It was the huge mountain range formed when Africa pushed northward into Europe in Eocene time
It was the supercontinent that formed in the late Paleozoic and broke apart in Mesozoic
It was a large, Precambrian shield area of Africa and South America that broke apart early in the Proterozoic
How did the appearance of the smallest creatures, such as the microbes and bacteria, in Earth's early history impact the geosphere?
formation of rocks
decreased moisture
enriching the soil
caused land erosion
Fossils of a now extinct dinosaur have been found near the east coast of South America and the west coast of Africa. The dinosaur could not swim or fly. What does this suggest about the continents of South America and Africa?
The continents were once connected.
Prehistoric man transported the dinosaur between the continents.
The same type of animals evolved on both continents.
A land bridge once connected the continents.
Sedimentary rocks found high in the Himalayan Mountains have been found with fossils of clams and other marine life. What does this indicate about the origin of the Himalayan Mountains?
The Earth's crust that formed these mountains was once covered with an ocean.
Animals that now live on the mountains once lived under water.
Continental drift resulted two tectonic moving closer to each other over time.
There was once a large ocean at top of the mountains.
This is a diagram of fossils found in one dry area with many plants. From looking at the fossils, what can we infer about this area in the past?
The area was never covered with water.
The area was once covered with water.
The area was on top of a mountain
The area was a desert.
This U-shaped valley was produced by the action of a...
river
meteor
landslide
glacier
I don't even know.
The appearance of cyanobacteria in Earth's early history resulted in an excess of oxygen in the atmosphere, which fueled the evolution of complex life. In what other ways did oxygen impact Earth?
formation of mountains
dirt from chemical weathering
formation of rocks and mountains
formation of rocks
Me has no brain cells.
Based on evidence, scientists believe Earth is over four billion years old. Indirect evidence, such as radioactivity of certain elements found in rocks, as well as direct evidence, such as observations of Earth's rock layers, are used to help scientists make these calculations. Rock formations and the fossils within them can help scientists establish relative ages of major events in Earth's history. Which statement describes the most accurate conclusion scientists can make based on the evidence given?
A scientist discovers a layer of dark metamorphic rock and concludes a volcano had erupted in that location.
After discovering a thick layer of igneous rock, scientists conclude that area was once part of an ocean.
Upon discovering pieces of cracked limestone, a scientist concludes an earthquake happened in that area.
Scientists conclude sand stones with ripple marks might indicate a shoreline habitat or a riverbed.
I am confusion.
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided. Because both these continental landmasses have about the same density, one plate could not be subducted under the other. The pressure of the impinging plates could only be relieved by thrusting skyward, and forming the _______________ Mountains.
Eurasian
Rocky
Himalaya
Ural
I am confusion x2.
What could be considered evidence for the theory that the formation of the Grand Canyon took millions of years?
The earthquake that created the canyon took place about a million years ago.
The Colorado River has changed its course many times in the last million years.
The Grand Canyon was wider at the base, than it is at present, a few years ago.
The rocks that are part of the Canyon walls originated millions of years apart.
Once again, I am confusion.
What geological theory explains how llamas and camels, close relatives, might be found on different sides of the world?
Natural selection
Endosymbiont theory
Radiocarbon dating
Continental drift
Ummmmmm wut?????
Scientists theorize that Australia was once part of a larger mainland area but due to plate tectonics, broke away. According to island theory, scientists can explain ALL BUT one of these occurrences as a result of Australia becoming and staying an island for a very long time.
That is extremes in size, large or small.
That is the evolution of of flightless birds.
That is the presence of relics, like the marsupials.
That is a large assortment of plant dispersal mechanisms.
I am confusion #30,000
Dramatic changes in sea level occurred throughout the Cenozoic era and the rise and fall of sea level is recorded in the rocks of the _______________. Amazing numbers of fossil clams, snails, and sand dollars can be found in these marine rocks, along with fossilized whale bones and shark teeth.
Plateau
Valley and Ridge
Piedmont
Coastal Plain
Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that this area was
Once a desert
Located in a different place on Earth
Once underwater
Much colder in the past
Spring break had arrived and Carol's family went camping along the river seen here. During their stay, the family dug for fossils. Carol's father found pieces of elk skull and the bones of some other unidentified animals. Carol found an insect encased in amber and her little brother found two or three shark's teeth.
Based on the family's fossil evidence, what can we hypothesize about the past history of the camp site?
The climate was much colder in the past
There was no river in the area.
It was once glaciated
It was once underwater.
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