Astronomy Part 4

Front

What is the layer of the Sun that we normally see called? Options: corona, chromosphere, photosphere, radiative zone

Back

photosphere

Front

What is the primary fusion process occurring inside the Sun? Options: C --> Fe, H --> He, He --> H, He --> C

Back

H --> He

Front

What fraction of the solar system's mass is in the Sun? Options: about 2 %, about 10 %, about 50%, about 99%

Back

about 99%

Front

What is the length of the Sun's entire magnetic cycle?

Back

about 22 years

Front

Which of the following objects rotates most rapidly? Options: the Sun, our Moon, Earth, Venus

Back

Earth

Front

Which of the following phenomena on the active Sun are seen as loops of gas? Options: prominences, plages, spicules, filaments

Back

prominences

Front

How and where does the Sun make the energy we see?

Back

thermonuclear fusion in its core

Front

What is the solar wind?

Back

gases leaving the Sun forever

Front

What pair of opposing effects keeps the Sun stable today?

Back

gravity versus thermal energy from fusion

Front

Which statement about the Sun's emissions is correct? Options: the Sun emits only yellow light, the Sun emits all wavelengths of light with equal intensity, the Sun emits all wavelengths, with one color emitted most intensely, the Sun emits only visible wavelengths, all of which it emits with equal intensity

Back

the Sun emits all wavelengths, with one color emitted most intensely