Name_________________________
Date____________
Crash Course Astronomy: Low Mass Stars
Use the following Words to complete the sentences below:
Convective
White Dwarf
Carbon
Helium
Hydrogen
Subgiant
Lava
Red Dwarf
Fusion
6 Billion
Luminosity
Mass
Fusion
Earth
Energy
Radiative Zone
1. Stars make energy by fusing ________________ into _______________.
2. The rate at which hydrogen ______________ occurs depends on how much pressure a star has in its
core.
3. The lower the __________ a star has, the longer it will live.
4. A ______ _____________ lives about 1 trillion years.
5. The three layers of a star are its _________________ zone, the
_____________________ zone, and the core.
6. As part of the sun’s dying process, it will get brighter as it gets hotter, true or false?
__________________
7. After a star’s main sequence, it becomes a _________________, where it will grow and the color
will change as its temperature cools.
8. A subgiant star will experience a 2000x increase in ________________ as it becomes a red giant.
9. The buildup of __________________ stops helium fusion in a star.
10. When a star can no longer produce energy, it becomes a ___________ _____________, the
final evolutionary stage for a star that does not have enough mass to become a neutron star.
11. When our Sun reaches the Red Giant phase, the ____________ will turn into a molten ball of lava.
12. It is estimated that our Sun will become a subgiant star in approximately _________________ years.