Question

1/Which of the following choices does not list one of the sun’s atmospheric layers

A/ photosphere

B/ corona

C/ convection zone

D/ chromosphere

5/ suppose that C fuses with He. What is the product

A/ C

B/ N

C/ O

D/ Be

8/ if the Sun’s core temperature went out of balance and decreased a little, pressure in the core would……and the core would…., causing the core temperature to…, which in turn would…the reaction rate, thus bringing it back to normal.

A/ decrease, shrink, rise, increase

B/ increase, expand, drop, increase

C/ decrease, expand, drop, drop

D/ increase, shrink , rise, increase

9/ as energy moves out of the Sun’s core toward its surface, it first travels by…,then by…, and then by…

A/ radiation, convection, radiation

B/ convection, radiation,radiation

C/ convection, convection, radiation

D/ radiation , convection, conduction

11/ all of the following lines of evidence support our current explanation for why the Sun shines. Which one uses direct observations to probe what goes on in the core of the Sun

A/ mathematical models which predict the surface temperature and luminosity of the Sun

B/ results from helioseismology

C/ the total number of solar neutrinos we observe

D/ all of the above

12/ stars form in molecular clouds. Molecular clouds are interstellar gas clouds which are…

A/ cold and dense

B/ warm and dense

C/ warm and diffuse

D/ cold and diffuse

14/ imagine keeping very careful track of the position of a star in the sky over a period of many years. The star moves a small amount over that time, in what looks to be a circle. What planetary detection technique have you just engaged in ?

A/ the direct detection technique

B/ the gravitational lensing detection technique

C/ the Doppler detection technique

D/ the astrometric detection technique

17/ what is a drawback to using the gravitational lensing technique when looking for extrasolar planets

A/ you need high-resolution spectra in order to determine the very small Doppler shifts involved

B/ you have to be able to determine the position of the star extremely accurately

C/the event which let us discover the planet is not repeatable

D/ the planetary system has to be face-on to us

19/ How can the nebula theory of solar system formation be modified to explain the location of “hot Jupiter” extra solar planets?

A/ it can’t

B/ the theory can be modified to account for the formation of Jovian planets close to their parent stars

C/ the theory can be modified to account for the strong gravity of massive stars pulling Jovian planets inward

D/ the theory can be modified to account for “planetary migration” caused by density waves passing through the protoplanetary disk

Answer 1