Understanding the Glow of Stars

What is a star primarily made of?

• Rocks and minerals

• Solid metal

• Ice and water

• Hot gas

What are the two main types of gases in most stars?

• Carbon Dioxide and Methane

• Oxygen and Carbon

• Nitrogen and Oxygen

• Hydrogen and Helium

What happens during nuclear fusion inside a star?

• Carbon fuses into nitrogen

• Oxygen turns into carbon

• Hydrogen atoms combine to form helium

• Helium atoms split into hydrogen

What process allows stars to produce energy?

• Mechanical rotation

• Chemical reaction

• Nuclear fusion

• Photosynthesis

What is primarily responsible for a star's glow?

• Electricity

• Gravitational pull

• Magnetic fields

• Nuclear fusion

How is true brightness different from apparent brightness?

• True brightness is how bright a star is from Earth

• Apparent brightness is the actual power of a star

• Apparent brightness is the color of the star

• True brightness measures the actual power of a star

What does the term 'luminosity' refer to in astronomy?

• The true brightness of a star

• The size of a star

• The distance of a star from Earth

• The color of a star

What unit might astronomers use to describe the luminosity of a star?

• Wattages

• Celsius

• Light years

• Miles

Can smaller stars be more powerful than bigger stars?

• Yes, sometimes

• No, never

• Only during eclipses

• Only if they are closer to Earth

Which factor is more important in determining a star's apparent brightness?

• Color

• Size

• Shape

• Distance from Earth