Essential Question:

Unit Questions

By:

Claumetria Jones

Overview

• Star = giant ball of gas which releases energy produced by nuclear fusion in its core

• 1. Clouds of cold molecular hydrogen

• 2. Clouds collapse

• 3. Clouds fragments into many pieces

• 4. Pieces become individual stars

• 5. Pieces continue to collapse until …..

• 6. Ignition of nuclear fusion (74% hydrogen, 25% helium, and 1% combination carbon, nitrogen, and oxygen)

• Stars = different sizes

• Supergiant stars :100 to 1000X larger

• Giants stars: 10 to 100X larger

• Dwarf stars :1000X smaller

Stars = ball shaped

•Look pointed because of moving air

• Stars do not last forever

• Stars stop shining…..not enough fuel

• Stars…..fade out or explode

• Old stars…..new stars

• Stars’ life = different stages Smaller = Longer Life• Millions or billions of years to complete stages • Few million years for a gas cloud to collapse and become a star• Stars 50 times the mass of our sun = 10 million years• Stars with 1/100 the mass of our sun = one trillion years

Comparison: Human Life to Star Life

For additional Information…