A star is formed from a swirling cloud of dust and gas
called a nebula. The forces of gravity press the matter in the
nebula together. When the matter is pressed tightly enough, it gets
hotter and hotter, until a new star is born. This new star is large
and cool. Cool is 3,000 degrees Celsius! This new star has a
red glow.
If the star continues to compress together, the matter
may become one of several different colors. A yellow colored star
may form that is considered lukewarm. A white star, which is
warm, may also form. Finally, if the matter is compressed very
tightly, the hottest star is formed. It is blue in color. Our
sun is a yellow star.
Hot
Warm
Lukewarm
Cool
blue
white
yellow
red
Directions: Answer the questions about how a
star is formed.
A
is a swirling cloud of dust and gas.
A
star has a temperature of 3,000 degrees Celsius.
What color star is our sun?
What color star is cooler than our sun?
Put the stars in order from cool to hot. Use the
numbers 1, 2, 3, 4. 1 being cool and 4 being hot.
blue
red
white
yellow
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