Observationally,how Can We Tell the Difference Between a White-Dwarf Supernova

question 76

Multiple Choice

Observationally,how can we tell the difference between a white-dwarf supernova and a massive-star supernova?

• A)A massive-star supernova is brighter than a white-dwarf supernova.
• B)A massive-star supernova happens only once,while a white-dwarf supernova can repeat periodically.
• C)The spectrum of a massive-star supernova shows prominent hydrogen lines,while the spectrum of a white-dwarf supernova does not.
• D)The light of a white-dwarf supernova fades steadily,while the light of a massive-star supernova brightens for many weeks.
• E)We cannot yet tell the difference between a massive-star supernova and a white-dwarf supernova.

---

Definitions:

Neustonic

Pertaining to the thin surface layer of an aquatic environment where organisms may float or swim.

Experience Turnover

The rate at which employees leave a workplace and are replaced by new personnel.

Brittle Stars

Ophiuroidea, a large class of echinoderms that are characterized by their long, slender, and often highly flexible arms, which distinguish them from starfish.

Benthos

Bottom-dwelling sea organisms that fix themselves to one spot, burrow into the sediment, or simply walk about on the ocean floor.