6.6.1 CQ Review

What type of star is our Sun?

• Red giant star
• main-sequence star

• White dwarf star
• nebula

What is the first stage in the life cycle of star?

• Black hole formation
• Formation of a nebula

• Galaxy collision
• Supernova explosion

What element is mostly found in nebulas?

• hydrogen

• helium

• carbon

• iron

What is the next stage of the star in our solar system?

• main sequence

• white dwarf

• nebula

• red giant

What happens to a main sequence star to become a red giant?

• It exhausts its core hydrogen fuel
• It loses its outer layers
• It cools down quickly
• It gains mass rapidly

What are the two properties measured on the HR diagram?

• luminosity and temperature
• mass and age
• distance and size
• brightness and color

What color stars are the hottest?

• Blue
• Green
• Red
• Yellow

What color stars are the coolest on the HR diagram?

• Red
• Yellow
• Green
• Blue

What stage of a star's life cycle is a cloud of dust and gases (hydrogen and helium)?

• White dwarf stage
• Black hole stage
• Supernova stage
• nebula stage

What is the end of the life cycle for our star?

• Galactic drift
• Black hole formation
• Supernova explosion
• white dwarf