Exam 10: The Sun: Our Parent Star

The solar wind is constantly removing mass from the Sun.

How large are granules, and how long do they last?

The Sun produces energy by fusing hydrogen into helium.

The solar neutrinos observed on Earth come from the hot spots in the corona.

The corona can only be glimpsed from Earth during a(n) .

The bright photosphere is much hotter than the faint corona.

Why is ten million degrees critical to the proton- proton cycle?

Visible sunspots lie in the

Are sunspots really dark and cool?

If the corona is so hot, why do we have to wait for a total solar eclipse to see it?

The solar winds blow outward from

The proton- proton cycle converts all of the mass of the four hydrogen atoms into pure energy.

What is meant by "neutrino oscillation"?

Sunspots are _ poles in the photosphere.

The primary source of the Sun's energy is

The Sun's structure is uniform throughout its interior, with no evidence of different layers.

Compared to the underlying photosphere and chromosphere, the corona is in temperature.

What are the main constituents of the solar wind? Which travel faster?

What natural barrier usually prevents two protons from combining?

The Sun's radius is one astronomical unit by definition.