This topic contains a solution. Click here to go to the answer

Author Question: What hindered the acceptance of the continental drift theory? a. There was no evidence of tropical ... (Read 73 times)

stock

  • Hero Member
  • *****
  • Posts: 573

What hindered the acceptance of the continental drift theory?
  a. There was no evidence of tropical plants ever existing in currently cold areas.
  b. The explanation of centrifugal effect as the driving force behind the continents moving.
  c. The discovery of similar fossils found on different continents.
  d. The general shape of the continents.



Question 2

What features did Dr. Ballard not encounter during his National Geographic exploration to the midocean
  ridge?
  a. the rift valley
  b. faults and fractures
  c. lava flow
  d. tube worms




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

frogdreck123456

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

ANS: B
Alfred Wegener believed the continents were slung toward the equator due to a combination of the
Earth spinning and tidal drag. This was not a sufficient enough explanation for the acceptance of
continental drift. Later it would be discovered that seafloor spreading and plate tectonics would
explain the force of his theory. Information can be found in the section Pieces of Earth's Surface Look
Like They Once Fit Together.



Answer to Question 2

ANS: D
Dr. Ballard traveled 9100 ft in Alvin to observe the structure of a mid-ocean ridge including the rift
valley, fissures, cracks, and faults, and lava flows. Information can be found in the section Insight
from A National Geographic Explorer: Dr. Ballard recounts an expedition to a mid-ocean ridge.




stock

  • Hero Member
  • *****
  • Posts: 573
Both answers were spot on, thank you once again




 

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

For a complete list of videos, visit our video library