Stellar Life Cycle Quiz

What is the energy source of a star?

• Chemical reaction

• Electromagnetic radiation

• Nuclear fusion

• Nuclear fission

What happens to the core of a star when the hydrogen runs out?

• It expands to become a red giant

• It explodes in a super-nova

• It becomes a white dwarf

• It collapses and gets denser and hotter

What is the remnant core of a star like the sun at the end of its life called?

• White dwarf

• Black hole

• Neutron star

• Red giant

What happens to the outer layers of a star when it becomes a planetary nebula?

• They expand and drift off into space

• They explode in a super-nova

• They fuse to form heavier elements

• They collapse and form a black hole

What is the final stage of a white dwarf after it cools down?

• Super giant

• Black dwarf

• Neutron star

• Red giant

What happens to the core of a massive star when it forms an iron core?

• It explodes in a super-nova

• It bounces off and forms a neutron star

• It collapses and forms a black hole

• It expands to become a red giant

What is the remnant core of the most massive stars called?

• Black hole

• Red giant

• White dwarf

• Neutron star

What is the primary reason for understanding stars according to the text?

• To predict the future of the universe

• To understand the origin of the solar system

• To study the behavior of galaxies

• To explore the possibility of life on other planets

What is the primary function of stars in the universe?

• To act as a source of gravitational force

• To create heavier elements through fusion

• To provide light and heat to planets

• To maintain the stability of the solar system

What are the raw materials from which our sun and planets were made?

• Helium and lithium

• Oxygen and nitrogen

• Iron and carbon

• Hydrogen and helium