Stars Properties

What is the spectral classification system used to plot the star brightness in one axis and star temperature on another

• Hertzsprung-Russell (HR) system

• Henry Draper Catalogue (HD) system

• Hipparcos system

• Morgan-Keenan (MK) system

How do stars form from clouds of gas and dust in space?

• Thermal expansion and kinetic energy

• Gravitational collapse and nuclear fusion reactions

• Magnetic fields and gravitational waves

• Chemical reactions and electromagnetic forces

What process powers a star by converting hydrogen into helium in its core?

• Thermal expansion

• Solar flares

• Hydrogenation

• Nuclear fusion

What are the layers of a star's atmosphere, from the innermost to the outermost?

• Core, Radiative Zone, Convective Zone, Photosphere, Chromosphere, Corona

• Photosphere, Chromosphere, Corona, Mantle, Crust, Core

• Inner Core, Outer Core, Mantle, Crust, Lithosphere, Asthenosphere

• Core, Radiative Zone, Convective Zone, Photosphere, Chromosphere, Corona, Mantle, Crust

Which stellar classification category includes the hottest and brightest stars?

• K-type stars

• O-type stars

• M-type stars

• G-type stars

What is the name of the process where a star's core contracts and heats up, leading to the initiation of nuclear fusion?

• Star contraction

• Nuclear fusion

• Core fusion

• Thermal compression

What is the most common element found in stars that undergo nuclear fusion?

• Helium

• Oxygen

• Hydrogen

• Carbon

Which type of star has a surface temperature between 5,000 and 6,000 degrees Celsius?

• Neutron star

• Red giant star

• Main sequence star

• White dwarf star

What is the process by which a star like the Sun will eventually exhaust its nuclear fuel and shed its outer layers?

• Black hole formation

• Galaxy collision

• Supernova explosion

• Planetary nebula formation

What is the name of the classification category for stars that are cooler and less luminous than the Sun?

• M-dwarfs

• G-type stars

• K-dwarfs

• O-type stars