1-8: A, B, C OR D Question 1 1 pts Which mechanism of radioactive decay involves

Question

1-8: A, B, C OR D

Question 1 1 pts Which mechanism of radioactive decay involves a loss of both protons and neutrons for a decrease in atomic number and atomic mass in the daughter product? O A) Alpha emission O B) Beta capture. O C) Beta emission. O D) A, B and C all involve a loss of protons and a loss of neutrons. Question2 1 pts Which pair of isotopes involved in absolute dating of marine sediments uses ratios of stable isotopes rather than an unstable parent isotope-stable daughter isotope pair? 14. B) Potassium-40 / Argon-40 O C) Strontium-87 Strontium-86. D) Uranium-238 / Lead-206 Question 3 1 pts Packages of sedimentary rock deposited on continents during transgressions of the ocean onto the continents are called A) Cratonic sequences. B) Exotic terranes. O C) Unconformities. O D) Seismic sequences

Explanation / Answer

Question 1: Which mechanism of radioactive decay involves a loss of both proton and nuetrons for a decrease in atomic number number and atomic mass in the daughter product.

Answer: Alpha Emission.

Question:2 Which pair of isotopes involved in absolute dating of marine sediments uses ratios of stable isotopes rather than an unstable parent isotope - stable daughter isotope pair?

Answer : Uranium-238/Lead-206.

Question:3:Packages of sedimentry rock deposited on continents during transgressions of the ocean onto the continents are called.

Answer. Unconformities.

Question 4) The greater reproductive success of individuals in a population because of some special feature that allows them to axcel in their enviroment is called.

A). Adoption.

B).Evolution.

C) Homology.

D)Natural selection.

Answer: Evolution.

Question 5.) Which of the following is NOT currently offered as a proof of plate tectonics.

A)Glacial evidence in the southern part of the most recent supercontinent.

B) Land bridges that are hypothesized to have connected continenets in the past.

C) Rock formation that are identical on either side of the Atlantic ocean.

D)Actually, all of the above are proofs of plate tectonics.

Answer:Actually, all of the above are proofs of plate tectonics.

Question:6 Pieces of the continental crust that behaves as a unit and that get welded onto the margins of large continents they encounter are called.

Answer :)Seismic sequences.

Question 7: New oceanic crust is produced at old oceanic crust is pulled down into the menatal at .

Answer: )New oceanic crust is produced and old oceanic crust is pulled down into the mantel of transform plate boundaries.

Question 8: Most earthquakes and volcanos on earth take palce at ( over)

Answer: On the margins of tectonics plates.

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