What is the primary source of the Sun’s energy?
A) Nuclear fusion
B) Nuclear fission
C) Gravitational compression
D) Solar wind
Answer: A) Nuclear fusion
Which layer of the Sun’s atmosphere is visible during a solar eclipse?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: C) Corona
What is the outermost layer of the Sun’s atmosphere?
A) Photosphere
B) Chromosphere
C) Corona
D) Core
Answer: C) Corona
What is the Sun predominantly composed of?
A) Hydrogen and helium
B) Oxygen and carbon
C) Iron and nickel
D) Methane and ammonia
Answer: A) Hydrogen and helium
Which layer of the Sun is responsible for the emission of visible light?
A) Photosphere
B) Chromosphere
C) Corona
D) Core
Answer: A) Photosphere
What is the Sun’s approximate surface temperature?
A) 5,500 degrees Celsius
B) 10,000 degrees Celsius
C) 1 million degrees Celsius
D) 15 million degrees Celsius
Answer: A) 5,500 degrees Celsius
Which region of the Sun is characterized by rising and falling currents of hot gas?
A) Photosphere
B) Chromosphere
C) Convection zone
D) Radiative zone
Answer: C) Convection zone
What causes the Sun to shine?
A) Nuclear fission
B) Nuclear fusion
C) Gravitational compression
D) Solar flares
Answer: B) Nuclear fusion
Which layer of the Sun’s atmosphere is known for its reddish color and contains solar prominences?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: B) Chromosphere
What is the Sun’s magnetic activity cycle called?
A) Solar year
B) Solar eclipse
C) Solar maximum
D) Solar wind
Answer: C) Solar maximum
What is the primary force that opposes gravitational collapse in the Sun’s core?
A) Nuclear fusion
B) Magnetic forces
C) Gravitational compression
D) Radiation pressure
Answer: D) Radiation pressure
What is the Sun’s core mainly composed of?
A) Hydrogen and helium
B) Iron and nickel
C) Oxygen and carbon
D) Silicon and sulfur
Answer: A) Hydrogen and helium
Which layer of the Sun is the densest?
A) Photosphere
B) Chromosphere
C) Convection zone
D) Radiative zone
Answer: D) Radiative zone
What phenomenon causes the Sun to emit charged particles into space?
A) Solar wind
B) Solar flare
C) Solar prominence
D) Solar eclipse
Answer: A) Solar wind
Which of the following is a feature of the Sun’s surface caused by intense magnetic activity?
A) Solar flare
B) Solar wind
C) Solar prominence
D) Solar eclipse
Answer: A) Solar flare
What is the primary mechanism for energy transport in the Sun’s core?
A) Convection
B) Conduction
C) Radiation
D) Gravitational compression
Answer: C) Radiation
How long does it take for energy produced in the Sun’s core to reach the surface?
A) Seconds
B) Minutes
C) Hours
D) Days
Answer: B) Minutes
What is the Sun’s approximate age?
A) 2 billion years
B) 4.6 billion years
C) 10 billion years
D) 13.8 billion years
Answer: B) 4.6 billion years
What is the Sun’s approximate mass?
A) 1 solar mass
B) 10 solar masses
C) 100 solar masses
D) 1,000 solar masses
Answer: A) 1 solar mass
What layer of the Sun’s atmosphere is the source of the solar wind?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: C) Corona
What is the Sun’s luminosity primarily due to?
A) Gravitational compression
B) Nuclear fusion
C) Magnetic activity
D) Solar flares
Answer: B) Nuclear fusion
What causes the Sun to have an 11-year sunspot cycle?
A) Changes in its rotation speed
B) Changes in its magnetic field
C) Changes in its temperature
D) Changes in its luminosity
Answer: B) Changes in its magnetic field
What is the layer of the Sun’s atmosphere directly above the photosphere?
A) Chromosphere
B) Corona
C) Convection zone
D) Radiative zone
Answer: A) Chromosphere
What is the Sun’s average density compared to water?
A) Greater than water
B) Equal to water
C) Less than water
D) Variable
Answer: C) Less than water
What is the primary process occurring in the Sun’s core?
A) Nuclear fission
B) Nuclear fusion
C) Gravitational compression
D) Convection
Answer: B) Nuclear fusion
What is the name of the phenomenon where the Sun temporarily darkens due to the passage of a celestial body in front of it?
A) Solar eclipse
B) Solar flare
C) Solar prominence
D) Solar wind
Answer: A) Solar eclipse
What is the Sun’s approximate distance from Earth?
A) 1 million kilometers
B) 150 million kilometers
C) 300 million kilometers
D) 500 million kilometers
Answer: B) 150 million kilometers
What is the Sun’s approximate radius?
A) 100,000 kilometers
B) 500,000 kilometers
C) 1 million kilometers
D) 2 million kilometers
Answer: A) 100,000 kilometers
What is the layer of the Sun’s atmosphere that is visible as a bright ring around the Moon during a solar eclipse?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: A) Photosphere
What is the Sun’s rotation period at its equator?
A) 24 hours
B) 27 days
C) 29 days
D) 36 days
Answer: B) 27 days
What is the Sun’s primary mechanism for energy transport in its outer layers?
A) Conduction
B) Convection
C) Radiation
D) Fusion
Answer: C) Radiation
What causes the granular appearance of the Sun’s photosphere?
A) Sunspots
B) Magnetic fields
C) Convection currents
D) Solar flares
Answer: C) Convection currents
What is the primary cause of the Sun’s magnetic field?
A) Convection currents in the core
B) Nuclear fusion reactions
C) Solar wind
D) Differential rotation
Answer: D) Differential rotation
Which layer of the Sun’s atmosphere is the hottest?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: C) Corona
What is the primary mechanism by which energy is transported from the Sun’s core to its surface?
A) Conduction
B) Convection
C) Radiation
D) Fusion
Answer: C) Radiation
Which layer of the Sun’s atmosphere is most easily observed with a hydrogen-alpha telescope?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: B) Chromosphere
What is the Sun’s approximate temperature at its core?
A) 5,500 degrees Celsius
B) 10,000 degrees Celsius
C) 1 million degrees Celsius
D) 15 million degrees Celsius
Answer: D) 15 million degrees Celsius
What causes the Sun to have a magnetic field?
A) Convection currents in the core
B) Nuclear fusion reactions
C) Solar wind
D) Differential rotation
Answer: D) Differential rotation
What is the name of the phenomenon where loops of plasma follow magnetic field lines above the Sun’s surface?
A) Solar eclipse
B) Solar flare
C) Solar prominence
D) Solar wind
Answer: C) Solar prominence
What is the Sun’s approximate luminosity?
A) 1 solar luminosity
B) 10 solar luminosities
C) 100 solar luminosities
D) 1,000 solar luminosities
Answer: A) 1 solar luminosity
Which layer of the Sun’s atmosphere is the source of the solar wind?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: C) Corona
What is the Sun’s luminosity primarily due to?
A) Gravitational compression
B) Nuclear fusion
C) Magnetic activity
D) Solar flares
Answer: B) Nuclear fusion
What causes the Sun to have an 11-year sunspot cycle?
A) Changes in its rotation speed
B) Changes in its magnetic field
C) Changes in its temperature
D) Changes in its luminosity
Answer: B) Changes in its magnetic field
What is the layer of the Sun’s atmosphere directly above the photosphere?
A) Chromosphere
B) Corona
C) Convection zone
D) Radiative zone
Answer: A) Chromosphere
What is the Sun’s average density compared to water?
A) Greater than water
B) Equal to water
C) Less than water
D) Variable
Answer: C) Less than water
What is the primary process occurring in the Sun’s core?
A) Nuclear fission
B) Nuclear fusion
C) Gravitational compression
D) Convection
Answer: B) Nuclear fusion
What is the name of the phenomenon where the Sun temporarily darkens due to the passage of a celestial body in front of it?
A) Solar eclipse
B) Solar flare
C) Solar prominence
D) Solar wind
Answer: A) Solar eclipse
What is the Sun’s approximate distance from Earth?
A) 1 million kilometers
B) 150 million kilometers
C) 300 million kilometers
D) 500 million kilometers
Answer: B) 150 million kilometers
What is the Sun’s approximate radius?
A) 100,000 kilometers
B) 500,000 kilometers
C) 1 million kilometers
D) 2 million kilometers
Answer: A) 100,000 kilometers
What is the layer of the Sun’s atmosphere that is visible as a bright ring around the Moon during a solar eclipse?
A) Photosphere
B) Chromosphere
C) Corona
D) Convection zone
Answer: A) Photosphere
