Exam 8: The Sun

The Babcock model of the solar magnetic cycle explains the sunspot cycle as primarily a consequence of the Sun's ____.

Granulation is evidence that energy in the photosphere ____.

During nuclear fusion, four hydrogen nuclei fuse into how many helium?

The _______________ is a thin layer of gas from which Earth receives most of the Sun's light.

The layer above the chromosphere is the photosphere.

When the Sun generates its own energy, it uses weak forces to bind together atomic nuclei.

Nuclear fusion within the Sun proceeds step by step in a series of reactions called the neutron-neutron chain.

Stars, like our Sun, generate their energy by way of nuclear _______________.

Granulation is caused by convection currents just below the photosphere.

What is released from the proton-proton chain and is immediately absorbed by the surrounding gas, thereby heating it?

What forms of electromagnetic radiation from the Sun's emissions do we experience here on Earth? Illustrate how we know this to be the case with one practical example for each form.

When two arches in a magnetic field encounter each other, ____ can cause powerful eruptions called ____.

Spicules can trigger communications blackouts and auroras on Earth.

What causes auroras and where are they most prominent on Earth?

The images produced by _______________ reveal streamers in the corona that follow magnetic lines of force in the Sun's magnetic field.

What occurs during nuclear fusion within the Sun and how much energy is produced?

Figure 8-1b Which layer of the Sun's atmosphere is represented in the accompanying visual-wavelength image?

Nuclear fusion in the Sun is tremendously powerful.

In order for nuclear fusion to occur, atomic nuclei must overcome the ____ by colliding violently.