8.Where did the element gold in your jewelry come from? Select one: a. Cores of

ID: 160544 • Letter: 8

Question

8.Where did the element gold in your jewelry come from? Select one:

a. Cores of low-mass stars.

b. Cores of massive stars.

c. Geological formations in the Earth.

d. Cores of stars.

e. Supernovae explosion.

9.A 2 solar mass neutron star is roughly the same size as

a. the Sun.

b. Illinois

c. Urbana/Champaign metropolis

d. the Earth

13.The core of a massive star at the end of its life is sort of like an onion's layers. Why is it so different than a low-mass star?

a. Larger radii allow for more layers

b. More mass allows for more elements to be present.

c. Gravity heats the core to higher and higher temperatures.

d. There is no real difference.

14. Atoms in a thin, hot gas (such as a neon advertising sign), emit light Select one:

a. only at one specific, single wavelength or color.

b. at specific wavelengths or colors, the pattern depending on the element.

c. only at visible wavelengths.

d. at all wavelengths, the shape of the continuum spectrum depending on the temperature of the gas.

15.Right now the Sun is in equilibrium (called hydrostatic equilibrium). What is in equilibrium with what? Select one:

a. Gravity and fusion

b. Gravity and supersonic expansion

c. Gravity and pressure

d. Gravity and water vapor

16.A red giant is Select one:

a. fusing up until iron in its core, and has layers of fusion around the core.

b. fusing He in the core, and has H fusion in a shell around the core.

c. not fusing at all, so it is off the main sequence.

d. not fusing in the core, and has H fusion in a shell around the core.

e. fusing H in the core only.

8.b. Cores of massive stars.

14. b. at specific wavelengths or colors, the pattern depending on the element.

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