Instruction Window

The Internet Sun Quiz consists of 10 questions randomly selected from NASA and other excellent Web sites. Answers are entered by clicking the option button that corresponds to your selection. The test is scored by clicking "Grade Test" at end of the exam. Correct answers are found through hypertext links located at the end of the exam. You may check the source of the answer by following the link to it.

Please answer ALL 10 questions

If you need to confirm your answers, a new browser window will open as you hyperlink. To return to the Quiz Page, Close the new window and press the back button on your browser.
LOOKING AHEAD

Question #1: Solar energy is created deep within the core of the Sun. It is here that the temperature (15,000,000° C; 27,000,000° F) and pressure (340 billion times Earth's air pressure at sea level) is so intense that nuclear reactions take place.

(B) Core

(this information is found at (Views of the Solar System)

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PARTS OF THE SUN

Question #2: The Sun's outer visible layer is called the photosphere and has a temperature of 6,000°C (11,000°F). This layer has a mottled appearance due to the turbulent eruptions of energy at the surface.

(A) photosphere

(this information is found at Views of the Solar System)

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SUNS CLASSIFICATION

Question #3: Stars given a designation consisting of a letter and a number according to the nature of their spectral lines which corresponds roughly to surface temperature. The classes are: O, B, A, F, G, K, and M; O stars are the hottest; M the coolest. The numbers are simply subdivisions of the major classes. The classes are oddly sequenced because they were assigned long ago before we understood their relationship to temperature. O and B stars are rare but very bright; M stars are numerous but dim. The Sun is designated G2.

A). G2

(this information is found at ( SEDS Nine Planets Glossary)

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MYTHOLOGIES

Question #4: The Sun is personified in many mythologies: the Greeks called it Helios and the Romans called it Sol.

(A) Sol

(this information is found at ( SEDS Sun)

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THE AGE OF THE SUN

Question #5: The Sun is about 4.5 billion years old. Since its birth it has used up about half of the hydrogen in its core. It will continue to radiate "peacefully" for another 5 billion years or so (although its luminosity will approximately double in that time).

(A) 4.5

(this information is found at ( SEDS Sun)

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PARTS OF THE SUN

Question #6: Radiative zone--includes core. Energy is transported from the superhot interior to the colder outer layers by photons. Makes up sun's radius.

(A) Radiative zone

(this information is found at ( The Sun and its Structure)

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PARTS OF THE SUN

Question #7: Photosphere--surface of sun. Is dense enough gas that we can't see through it and it gives off continuous radiation. About 5800 degrees Kelvin.

(B) Photosphere

(this information is found at ( The Sun and its Structure)

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PARTS OF THE SUN

Question #8: This part of the sun can only be studied closely during eclipses. Corona--very high temperature: 1-2 million degrees Kelvin! But very low density so it has a low amount of heat. Pearly white color seen in eclipses.

(C) Corona

(this information is found at ( The Sun and its Structure)

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THE CENTER OF THE SUN

Question #9: In every second, the Sun spends 700 billion tons of protons (or: Hydrogen) in this way. And only a small fraction (0.7 percent) is turned into light.

(A) 700

(this information is found at (The Virtual Sun)

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THE SURFACE OF THE SUN

Question #10: The photosphere is the thing you see when you look at the sun.

(B) photosphere

(this information is found at (The Virtual Sun)

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