Life Cycle of a Star

Which object in the solar system is a star?

• Earth

• Jupiter

• the Sun

• the Moon

All stars start as a (a)   .

Pick the vocabulary word that best describes the following:

A red super giant star explodes

• Protostar

• Nebula

• Black Hole

• Supernova

The most massive stars become ___ ____ when they die.

(a)  

Scientists measure distance to the stars in light-years. Which correctly describes a light-year?

• The brightness level of the starlight reaching Earth

• The length of time a star has been sending out light

• How far light can travel in one year

• How many years it would take to travel to a particular star

The brightness of a star helps scientists to classify it. Scientists call a star's brightness its-

• Flash

• Magnitude

• Glow

• Shine

Why is the sun the only star in the galaxy that supplies energy to Earth?

• The sun is the closest star

• The sun is the hottest star

• The sun is the biggest star

• The sun is the oldest star

Which characteristic of stars is MOST closely related to temperature?

• Size

• Color

• Density

• Brightness