Where did Saturn's rings likely come from?
A. volcanic activity on its surface ejecting matter into space
B. either a moon that never formed, or a moon destroyed by tidal forces
C. the decay of radioactive particles in the outer fringes of Saturn's upper atmosphere
D. the gravitational capture of old satellites and other space junk lost from Earth's orbit and other space missions
Answer: B
You might also like to view...
Temperature inversions increase outdoor air pollution because they
A. accelerate photochemical reactions. B. are taller than most smokestacks. C. prevent brown air smog. D. prevent the natural mixing of air. E. accelerate the emission of primary pollutants.
Pumice and scoria both exhibit a vesicular texture.
Indicate whether the statement is true or false.
The angle of repose for dry unconsolidated material is about 45 degrees
Indicate whether the statement is true or false
The dwindling supplies of rare strategic metals such as indium, tantalum, and platinum may be extended if we rigorously ________
A) relax environmental requirements for mining B) increase demand for the products in which they are used C) reduce demands for social and economic justice D) recycle existing supplies E) exploit known deposits more efficiently