What processes are thought to be occurring during formation of this astronomical event? (Image is computer generated)
A. nuclear fusion and nucleosynthesis of helium, convection in the interior, and emission of electromagnetic radiation and heat
B. nuclear fusion and emission of energetic electromagnetic radiation
C. nuclear fusion, gravitational attraction of material, and movement and rotation of the galaxy
D. ejection of material from a star, at a high rate and in all directions
Answer: D
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Most often, sediments found on the beaches of depositional coasts are supplied by ____
A) erosion of local coastal cliffs B) erosion of basement rock along the shoreline C) glacial processes D) rivers or ocean currents
Incorporation of passive safety features in nuclear power plants would reduce the chances of a disaster by reducing the chances of
A) human error. B) retraction of the control rods. C) terrorist attacks. D) design flaws.
Although considered a newly industrializing economy, Brazil has about ________% of its workforce engaged in agriculture
A) 5 B) 17 C) 21 D) 33
The geological study of rocks around a previously active volcano ____
a. ?is of scientific interest but does not aid eruption prediction b. ?is complicated by the effects of erosion c. ?concentrates on the study of tuff layers, with little other useful information d. ?can detect chemical changes in rocks caused by carbon dioxide emissions e. ?can only identify sites of lava flows