GeoE 203 exam 1

.pdf

School

Casper College *

*We aren’t endorsed by this school

Course

203

Subject

Geology

Date

Jan 9, 2024

Type

pdf

Pages

5

Uploaded by SargentRain857

Report
User xxx-xxxx Course GEOE 203: Earth Dynamics - 01708 - F23 (ONLINE) Test GEOE 203 Fall2023 Exam 1 Started 9/8/23 10:47 AM Submitted 9/8/23 11:36 AM Due Date 9/10/23 11:59 PM Status Completed Attempt Score 49 out of 49 points Time Elapsed 49 minutes out of 1 hour Results Displayed Submitted Answers, Feedback • Question 1 1 out of 1 points All of the following are true about the magnetic north pole except: Selected Answer: the magnetic north pole is still in the same place as the flag early explores placed • Question 2 1 out of 1 points Atoms larger and heavier than iron are generally formed by: Selected Answer: novas and collisions of neutron stars • Question 3 1 out of 1 points Cleavage always: Selected Answer: forms a flat surface • Question 4 1 out of 1 points Compared to the rocks that make up the continental crust, the rocks that make up the oceanic crust are: Selected Answer: denser • Question 5 5 out of 5 points Describe at least 3 pieces of evidence that Wegner used to argue for Continental Drift. Selected Answer: Wegner had used the fact the continent all fit together to argue for continental drift. Moreover, Wegner used Glossopteris fossil, a subpolar plant with heavy seed to argue. Indeed, the Glossoteris fossils were found on all southern continents. Lastly, Wegner used Mesosaurus fossils, a freshwater reptile that was found in Africa as well as in South America. This reptile would not have been able to swim across an ocean. Response Feedback: [None Given] • Question 6
5 out of 5 points Describe the Scientific Method. (You can use your own words to describe the steps) Selected Answer: 1. Make an observation 2. Pose a question 3. Make a hypothesis to answer your question 4. Test your hypothesis through many experiments to disprove your hyspothesis 5. When proved wrong, report it and start over so then other can try to prove it wrong 6. When no one can prove it wrong, then your hypothesis can become a theory. Response Feedback: [None Given] • Question 7 5 out of 5 points Describe, in your own words, two things that make the tectonic plates move. Selected Answer: The two things that make the tectonic plates move are push and slab pull. Indeed, ridge push happen when the elevated Mor push the lithosphere away and Slap pull happens when the gravity pulls a subducting plate downwards. In sum, ridge Push and Slab Pull, in convection, make the plate drive in motion. Response Feedback: [None Given] • Question 8 1 out of 1 points Differentiation of the Earth resulted in the core, mantle, and crust. This could happen because: Selected Answer: the Earth was very hot • Question 9 1 out of 1 points Glossopteris is: Selected Answer: an important plant fossil that helped show the continents were once connected. • Question 10 1 out of 1 points How can you tell the hardness of a mineral? Selected Answer: all of the above • Question 11 1 out of 1 points How old is the Earth? Selected Answer: 4.6 billion years old
• Question 12 1 out of 1 points In the Earth’s crust, ¾ of the minerals contain these 2 elements (different than the Earth as a whole): Selected Answer: oxygen and silicon • Question 13 1 out of 1 points In the seafloor, the rock areas with negative magnetic anomalies were formed when the Earth’s magnetic field was: Selected Answer: reversed polarity • Question 14 1 out of 1 points Magnetic anomalies in the ocean floor: Selected Answer: are always parallel to the ocean ridges. • Question 15 1 out of 1 points Minerals are classified into named groups based on: Selected Answer: chemistry, specifically the dominant anions in their formulas (like SiO 2 4- and CO 3 2- ) • Question 16 1 out of 1 points Minerals in geodes are often pretty and well formed, with smooth surfaces. They can be described as: Selected Answer: Euhedral • Question 17 1 out of 1 points Silicates have many ways that they can form networks of tetrahedra. Which of these does NOT appear in silicate minerals? Selected Answer: Helix shaped chains • Question 18 1 out of 1 points The Earth’s magnetic field is important. It does all the following except: Selected Answer: keeps the iron core from expanding outward • Question 19 1 out of 1 points The boundary between the crust and the mantle is a seismic velocity discontinuity called: Selected Answer: the Moho • Question 20
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help