#1
What is the primary source of energy in stars?
Nuclear Fusion
ExplanationNuclear fusion powers stars by converting hydrogen into helium.
#2
What is the approximate temperature at the core of the Sun?
15,000,000°C
ExplanationThe Sun's core temperature is approximately 15 million degrees Celsius.
#3
What is the name of the phenomenon where the Sun appears to be ringed by a halo during certain atmospheric conditions?
Sun Dog
ExplanationA sun dog is an atmospheric phenomenon causing bright spots to appear around the Sun.
#4
What is the name of the process by which stars like the Sun eventually exhaust their nuclear fuel and become dimmer and cooler?
Stellar Evolution
ExplanationStellar evolution is the lifecycle of a star, including its eventual dimming and cooling.
#5
What is the name of the phenomenon in which a star's light is blocked by another celestial body, resulting in a temporary decrease in brightness?
Solar Eclipse
ExplanationA solar eclipse occurs when the Moon blocks the Sun's light from reaching Earth.
#6
Which of the following is the longest phase in the life cycle of a star?
Main Sequence
ExplanationThe main sequence is the longest phase where a star burns hydrogen into helium.
#7
What is the process by which a massive star ends its life in a tremendous explosion?
Supernova
ExplanationA supernova is the explosive end of a massive star's life.
#8
Which of the following is NOT a type of solar phenomena?
Nuclear Fission
ExplanationNuclear fission is not a solar phenomenon; it's a process of splitting atomic nuclei.
#9
What is the name of the process by which the Sun generates energy?
Nuclear Fusion
ExplanationThe Sun generates energy through nuclear fusion.
#10
Which of the following is a result of the Sun's magnetic field becoming twisted and tangled?
Solar Flare
ExplanationSolar flares are caused by the release of magnetic energy on the Sun's surface.
#11
What is the primary component of the Sun?
Hydrogen
ExplanationHydrogen is the main component of the Sun, fueling its nuclear fusion reactions.
#12
Which of the following is not a characteristic of a black hole?
Visible Surface
ExplanationBlack holes lack a visible surface due to intense gravitational pull.
#13
What is the process by which a star converts hydrogen into helium, releasing immense energy?
Nuclear Fusion
ExplanationNuclear fusion generates energy in stars by fusing hydrogen atoms into helium.
#14
Which layer of the Sun's atmosphere is visible during a total solar eclipse?
Corona
ExplanationDuring a total solar eclipse, the corona becomes visible as a bright halo around the Sun.
#15
What is the name of the process by which the Sun's energy is transported from its core to the surface?
Convection
ExplanationConvection carries energy from the Sun's core to its surface.
#16
Which of the following is a measure of the total amount of energy emitted by the Sun per unit time?
Solar Luminosity
ExplanationSolar luminosity measures the total energy output of the Sun per unit time.
#17
What is the term for a region on the Sun's surface that is cooler and darker than surrounding areas due to magnetic activity?
Sunspot
ExplanationSunspots are cooler areas on the Sun's surface caused by magnetic activity.