Clicker Questions about the Sun

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2) helium (He) into carbon (C)

3) hydrogen (H) into helium (He)

4) neon (Ne) into silicon (Si)

5) oxygen (O) into iron (Fe)

In the P-P cycle, four Hydrogen nuclei (protons) fuse into one Helium nucleus, releasing gamma rays and neutrinos.

Slide 9

If a neutrino can escape from the solar core within m1) minutes

2) hours

3) months

4) hundreds of years

5) about a million years

inutes, then how long does it take a photon to escape?

Slide 10

If a neutrino can escape from the solar core within minutes, then how long does it take a photon to escape?

1) minutes

2) hours

3) months

4) hundreds of years

5) about a million years

Gamma ray photons are absorbed and re-emitted continuously in the layers above the core.

They gradually shift in spectrum to visible and infrared light at the photosphere.

Slide 11

What is probably responsible for the increase in temperature of the corona far from the Sun’s surface?1) a higher rate of fusion

2) the Sun’s magnetism

3) higher radiation pressures

4) absorption of X-rays

5) convection currents

Slide 12

What is probably responsible for the increase in temperature of the corona far from the Sun’s surface?1) the higher rate of fusion

2) the Sun’s magnetism

3) higher radiation pressures

4) absorption of X-rays

5) convection currentsApparently the Sun’s magnetic field acts like a pump to increase the speeds of particles in the upper corona.

Slide 13

The number of sunspots and solar activity in general peaks1) every 27 days, the apparent rotation period of the Sun’s surface.

2) once a year.

3) every 5 ½ years.

4) every 11 years.

5) approximately every 100 years.

Slide 14

The number of sunspots and sola1) every 27 days, the apparent rotation period of the Sun’s surface.

2) once a year.

3) every 5 ½ years.

4) every 11 years.

5) approximately every 100 years.

r activity in general peThe sunspot cycle shows a consistent 11-year pattern of activity dating back more than 300 years.

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