ESS 101 B Exam 1 Questions and Answers | 100% Correct | Latest Updated 2026/2027 | Graded A+. Which of the sources of heat listed below were not important to the differentiation of the earth into compositional zones? (2 answers are correct) background thermal heating from residual "Big Bang"energy compressional heating as earth gained mass radioactive decay of natural radioactive elements solar heating kinetic energy of impacting planetesimals Question 5 Transformplate boundaries are typically associated with 0/2 pts ou Answered collisional margins where plates are being thrust over one another divergent margins where the rate of spreading is the same along segments of the spreading ridge convergent margins where the descending plates slows down during subduction convergent margins where the descending plates speeds up during subduction orrect Answer O divergent margins where the rate of spreading is different along segments of the spreading ridge Correct! Question 6 2/2 pts Which of the following statements are true related to the compositional zonation of the earth? (There are 2 correct answers). the earth became compositionally zoned when the sun first formed the densest compositional zones are in the earth's interior the earth became compositionally zoned when the melting temperature of quartz was exceeded the earth is not compositionally zoned Correct! the earth's atmosphere and oceans formed during differentiation and degassing Question 7 3/3 pts Match the magma/lava type with the appropriate geographic/tectonic setting where it is found. Correct! Asthenosphere gamet-peridotite Correct! Hawaii basalt v Correct! interior of Appalachian granite V Mountains Other Incorrect Match Options: andesite Correct! rhyolite Question 8 2/2 pts As a source rock partially melts into magma, the magma (melt phase) is than the residual source rock. (select the 2 correct answers) higher density more Fe-Mg rich lower density Correct! higher melting temperature minerals more silica rich Question 9 0.67/2 pts Observe the image of the porphyritic andesite shown below. Which of the following statements are true regarding the minerals comprising the rock? 3 answers are correct) C b porphyritic andesite orrect Answer the smallblack mineral (a) crystallized first Correct! the fine minerals (c) comprising the matrix likely crystallized above ground ou Answered the largewhite mineral (b) crystallized first Correct! the mineral that crystallizes first has the lowest freezing/melting temperature the mineral that crystallizes first also has the highest freezing/melting temperature
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