Why do supernova remnants have limited lifetimes?
What will be an ideal response?
They gradually mix with the interstellar medium and vanish.
You might also like to view...
Butadiene rubber has a very low tensile strength; therefore, it is primarily used as a(n) _________.
Fill in the blank(s) with the appropriate word(s).
Ozone in the Earth's upper atmosphere
A) filters incoming infrared light reaching Earth's surface. B) filters incoming visible light reaching Earth's surface. C) filters incoming ultraviolet radiation reaching Earth's surface. D) acts as a blanket to keep Earth's surface warm.
Which of the following is true of ancient constellations?
A) Out of all the ancient constellations, over 150 constellations are still in use. B) Ancient constellations were a grouping of bright and fainter stars. C) Ancient constellation boundaries, when they were defined at all, were only approximate. D) All the regions of the northern and southern sky were identified as constellations by ancient astronomers.
What is the primary way in which stars with masses similar to the Sun ultimately return some of their material to the interstellar medium?
A) by exploding as white dwarf supernovae B) through jets they may have during the protostar stage C) through planetary nebulae D) through the winds they have during their main-sequence lives E) Stars with masses similar to the Sun do not recycle any material back into the interstellar medium.