bright orange sun in the sunset sky with clouds

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The Sun

Check your knowledge about the Sun.

1 / 9

Why does the color of the Sun look yellow, orange, or red on Earth?

Our eyes selectively remove or scatter shorter (bluer) wavelengths more than longer ones, shifting the apparent color toward yellow, orange, or red.

The distance of the Earth to the Sun makes it look this way.

The atmosphere selectively removes or scatters shorter (bluer) wavelengths more than longer ones, shifting the apparent color toward yellow, orange, or red.

The radiation from the Sun emits light that is yellow, orange, or red.

When white light travels very long distance, it turns yellow, orange, or red.

2 / 9

What happens at the core of the Sun?

Nuclear fusion: Hydrogen nuclei (protons) fuse together to form helium, releasing enormous amounts of energy in the process.

Nuclear fission: Helium nuclei (protons) split to form hydrogen, releasing enormous amounts of energy in the process.

Carbon atoms melt then vaporize.

Large amount of gold is produced.

Large amount of carbon dioxide is produced.

3 / 9

What are the inner layers of the Sun?

The corona, core, and convection zone

The chromosphere, core, and convection zone

The core, radiative zone, and convection zone

The flare, core, and radiative zone

The corona, core, and radiative zone

4 / 9

Which of the following is true about the flare of the Sun?

Dark spots on the sun

Giant explosions on the sun that send energy, light and high speed particles into space

Gravitational force of the sun on the planets

Speed at which light travels from the sun to Earth

Distance between the sun and Earth

5 / 9

About how many Earths can fit in the Sun (mass and volume)?

It takes about 500,000 Earths to match the mass of the Sun and about 3 million Earths to fill the Sun's volume.

It takes about 330,000 Earths to match the mass of the Sun and about 1.3 million Earths to fill the Sun's volume.

It takes about 700,000 Earths to match the mass of the Sun and about 500,000 Earths to fill the Sun's volume.

It takes about 100,000 Earths to match the mass of the Sun and about 500,000 Earths to fill the Sun's volume.

It takes about 50,000 Earths to match the mass of the Sun and about 100,000 Earths to fill the Sun's volume.

6 / 9

What are the outer layers of the Sun?

The corona, core, and radiative zone

The chromosphere, core, and convection zone

The core, radiative zone, and convection zone

The photosphere, chromosphere, and corona

The photosphere, chromosphere, and radiative zone

7 / 9

What is the photosphere of the Sun?

The atmosphere of the Sun

Another name for the core of the Sun

Hot liquid hydrogen on the Sun

The layer from which most of the visible light we see is emitted

The light from the Sun that reaches the Earth

8 / 9

Which of the following is true about coronal holes?

Holes on the Sun's surface with strong gravitational pull

Cold dark spots on the Sun's surface

Regions on the Sun's surface where the Sun’s magnetic field lines extend out into space rather than looping back to the Sun’s surface

Holes on the Sun's surface with no nuclear activity

Regions on the Sun's surface with high concentration of carbon

9 / 9

Which of the following is true about a prominence of the sun?

Magnetic field generated by the Sun

Mountain structures on the Sun

Large, bright feature extending outward from the Sun’s surface

Curvature of the Sun

Weight of the Sun

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The average score is 44%

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References

[1] NASA. What is a Solar Flare? URL: https://science.nasa.gov/science-research/heliophysics/space-weather/solar-flares/what-is-a-solar-flare/

[2] NASA. What is a solar prominence? URL: https://www.nasa.gov/image-article/what-solar-prominence/

[3] NASA. The Solar Interior. URL: https://solarscience.msfc.nasa.gov/interior.shtml

[4] NOAA. Coronal Holes. URL: https://www.swpc.noaa.gov/phenomena/coronal-holes

[5] NASA. Our Sun: Facts. URL: https://science.nasa.gov/sun/facts/

[6] Space.com. What color is the Sun? URL: https://www.space.com/what-color-is-the-sun

[7] NASA. Layers of the Sun. URL: https://science.nasa.gov/blogs/the-sun-spot/2023/09/26/layers-of-the-sun/

[8] NASA. Our Sun: Facts. URL: https://science.nasa.gov/sun/facts/

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