What processes were occurring when this photograph was taken or at some time in the recent past?
A. nuclear fusion, gravitational attraction of material, and movement and rotation of the galaxy
B. ejection of material from a star, at a high rate and in all directions
C. nuclear fusion and nucleosynthesis of helium, convection in the interior, and emission of electromagnetic radiation and heat
D. nuclear fusion and emission of energetic electromagnetic radiation
Answer: D
You might also like to view...
Which of the following best exemplifies a decentralized power generation system?
A) A windfarm B) A solar panel on a house C) A hot water heater D) The Hoover Dam
What caused urban sprawl to occur around so many U.S. cities during the past five decades or so, and how can smart growth policies be useful in slowing it down in future years?
What will be an ideal response?
Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs by ________
A) burning of fossil fuels to meet our energy needs B) using antibiotics to reduce the numbers of denitrifying bacteria C) selectively removing leguminous plants D) producing synthetic fertilizers and applying them to crops, lawns, and parks E) increasing the erosion of farmlands through poor agricultural practices
If a rock containing kyanite, sillimanite, and andalusite were to undergo an increase in pressure, what must happen to temperature in order for that rock to continue to have stable kyanite, sillimanite, and andalusite?
A) temperature must increase B) temperature must decrease C) temperature must stay the same D) It is impossible for it to continue to have stable kyanite, sillimanite, and andalusite.