Stars, including our Sun, have a finite lifespan. They are born, develop, and eventually die. As stars like the Sun age, they expand into red giants, potentially reaching Earth's orbit. During this phase, the core contracts while the outer layers expand. Although Earth might survive this expansion, it would be lifeless due to increased heat. Eventually, the Sun will exhaust its energy, lose its atmosphere, and contract into a small, dark object. This marks the Sun's transition into a dead star, cooling over billions of years.

What is the initial stage of a star's lifecycle?

• Contracting its core

• Being born

• Becoming a red giant

• Cooling down

What happens to a star's size when it becomes a red giant?

• It swells to a massive size

• It remains the same

• It shrinks to a tiny size

• It disappears completely

How does the sun's heat change as it ages?

• It fluctuates randomly

• It increases dramatically

• It remains constant

• It decreases gradually

What happens to the sun's atmosphere when it exhausts its energy?

• It expands indefinitely

• It becomes more dense

• It becomes more vibrant

• It cannot be retained

What is the final state of the sun after it cools down?

• A red giant

• A vibrant star

• A dead star

• A supernova