39 Questions
What is the nature of the Sun's surface?
A visible layer of dense gas
Why do sunspots appear to move on the Sun's surface?
Because of the Sun's rotation on its axis
What is the duration of the solar cycle?
11-year cycle
What is the solar wind composed of?
Gas particles released from the corona
How can sunspots be tracked in real-time?
Through various astronomical resources
What is the primary composition of the Sun?
Hydrogen and helium
What is the process by which the Sun generates energy?
Nuclear fusion
What is the surface temperature of the Sun?
5500°C
What is the purpose of a filter or pinhole projector when observing the Sun?
To protect the eyes from damage
What is the term for the movement of fluid caused by differences in temperature and density within the fluid?
Convection
What is the term for the cooler, dark areas on the Sun's surface?
Sunspots
What is the term for the stream of charged particles released from the upper atmosphere of the Sun?
Solar wind
What equation describes the energy released by the Sun's nuclear fusion reactions?
E = mc^2
What is the primary reason the Sun is essential for life on Earth?
It provides light and heat
Which of the following processes occurs in the Sun's core?
Nuclear fusion
Why is it dangerous to look directly at the Sun?
It can cause permanent eye damage
What is the approximate temperature of the Sun's core?
15,000,000°C
How does the energy generated in the Sun's core reach the Earth?
Through the spread of heat and light
What is the composition of sunspots?
Cool, dark gas
What is the Sun's role in the solar system?
It is the center of the solar system
What is the term for the collection of planets and other celestial bodies that orbit the Sun?
Solar system
What occurs on the Sun's surface during a solar flare?
A sudden release of significant amounts of energy and particles
What is the primary purpose of using images and videos from sources like the SOHO space satellite?
To safely study the Sun and its activity
What is the correlation between the number of sunspots and the Sun's energy output?
The number of sunspots varies in an 11-year cycle, correlating with the Sun's energy output
What is the outer atmosphere of the Sun that releases gas particles into space?
The corona
What is the visible layer of dense gas on the Sun's surface that becomes opaque?
The photosphere
What percentage of the Sun's composition is made up of elements other than hydrogen and helium?
5%
What is the primary mechanism by which the energy generated in the Sun's core is transferred to its surface?
Convection
What is the temperature difference between the Sun's surface and its core?
14.5 million °C
What is the reason why sunspots appear darker than the surrounding areas on the Sun's surface?
They have a lower temperature
What is the approximate time it takes for energy generated in the Sun's core to reach its surface?
17,000 to 100,000 years
What is the term for the reaction that occurs in the Sun's core, where hydrogen nuclei combine to form helium?
Nuclear fusion
What is the primary reason why the Sun appears as a small, bright point of light in the night sky?
Due to its immense distance from Earth
What is the process by which the energy released from the Sun is transferred to the Earth?
Radiation
What is the primary reason for the 11-year solar cycle?
Changes in the Sun's magnetic field
What is the primary consequence of a solar flare?
A sudden increase in the Sun's energy output
What is the primary purpose of using images and videos from sources like the SOHO space satellite?
To track the movement of sunspots
What is the relationship between the number of sunspots and the Sun's energy output?
The number of sunspots is directly proportional to the Sun's energy output
What is the term for the visible layer of dense gas on the Sun's surface that becomes opaque?
Photosphere
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