Universe Study Guide

What is the main process that occurs in the core of a main sequence star?

• Fission of silicon into iron

• Nuclear fusion of hydrogen into helium

• Nuclear fission of helium into hydrogen

• Fusion of carbon into neon

Tags

NGSS.HS-ESS1-1

Which type of star is the Sun expected to become in about 5 billion years?

• Red Giant

• White Dwarf

• Neutron Star

• Brown Dwarf

Tags

NGSS.HS-ESS1-3

What is a characteristic of red dwarfs?

• They are visible to the unaided eye.

• They are the largest main sequence stars.

• They have life spans longer than the current age of the universe.

• They burn through their hydrogen supply quickly.

What happens to a star when it becomes a red giant?

• It becomes a neutron star.

• It explodes in a supernova.

• Its outer layers expand and it starts fusing helium into carbon.

• It collapses into a black hole.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Which of the following is true about white dwarfs?

• They are larger than the Sun.

• They produce new heat through fusion.

• They are visible to the unaided eye.

• They gradually cool over billions of years.

What is a pulsar?

• A brown dwarf with visible light emission

• A rapidly rotating neutron star

• A type of red giant star

• A main sequence star with a strong magnetic field

Which type of star is Proxima Centauri?

• Red Giant

• White Dwarf

• Neutron Star

• Red Dwarf

What is a defining feature of magnetars?

• They have weak magnetic fields.

• They are a type of brown dwarf.

• Their magnetic fields are up to a thousand times stronger than typical neutron stars.

• They are visible with the unaided eye.

What is the main difference between brown dwarfs and main sequence stars?

• Brown dwarfs emit visible light.

• Brown dwarfs are more massive than main sequence stars.

• Brown dwarfs are hotter than main sequence stars.

• Brown dwarfs do not have enough mass to sustain nuclear fusion like main sequence stars.

Which of the following stars is visible to the unaided eye and is a red giant?

• Van Maanen’s star

• Arcturus

• Sirius

• Procyon B