hw 7 – Flashcards

The element most abundant in the Sun is oxygen.

Solar flares have no known effect on Earth.

Astronomers can use ____ to measure magnetic fields on the sun.

_______ about 130 km above Earths surface near the polar regions when energy in the solar wind guided by Earths magnetic field excites gases in the upper atmosphere.

One sees differences in ________ depending on the time in the sunspot cycle.. I. the latitude at which most sunspots occur II. the number of sunspots that are visible III. the rotation rate of the suns equator IV. the magnetic polarity of the sunspot pair members in a hemisphere

A filtergram is used to study layers below the photosphere.

Which of the following is suggested as the best explanation of the missing solar neutrinos?

Granulation is caused by

Which of the following is evidence that convection occurs in the layers just below the suns photosphere?

Helioseismology is the study of the differential rotation and magnetic field of the sun.

The gas motions within granules on the solar surface are

The ____ is (are) the hot gases that are the moving extension of the suns corona.

Sunspots often appear in pairs.

A ____ is believed to occur when energy, stored in a twist in the solar magnetic field above a sunspot, is suddenly released.

The strong force is the force that

The ____ coincides with the period known as the "little ice age" of Europe and North America. This provides one piece of evidence that suggests a link between solar activity and the amount of solar energy Earth receives.

The proton-proton chain

Helioseismology shows that deeper layers of gas in the sun rotate at different speeds. When different parts of an object rotate at different rates it is called

The intensity of a sunspot is found to be 3 times smaller than the intensity emitted by the solar surface. What is the approximate temperature of this sunspot if the temperature of the solar surface is 5800 K?

As the moon covers the solar disk during a solar eclipse, a flash spectrum of the suns chromosphere can be recorded. This flash spectrum reveals an emission spectrum and provides information on the properties of the chromosphere. As the moon moves from the inner chromosphere to the outer chromosphere, the spectral lines present in the flash spectrum change. What is going on in the chromosphere that produces the changes in the flash spectrum? I. The temperature of the chromosphere decreases as the distance from the photosphere increases. II. The temperature of the chromosphere increases as the distance from the photosphere increases. III. The density of the chromosphere decreases as the distance from the photosphere increases. IV. The density of the chromosphere increases as the distance from the photosphere increases.