In this layer of the sun are cooler particles pulled down by gravity.
What is the convection zone?
200
Solar flares.
What are bursts of energy from the sun's atmosphere?
200
In which layer do sun spots occur?
What is the photosphere?
200
If you know the mass of a star, you know...
What is nothing except the mass of the star?
200
Name the 4 basic shapes of the galaxies.
What are spiral, barred spiral, elliptical, and irregular?
200
Older stars are located in the center of the spiral galaxy and younger stars are in the arms. Explain why this happens.
What is because gravity pulls stars to the center and younger stars haven't been around long enough to be pulled in yet?
300
Main sequence
What is the classifying group where most stars belong?
300
This produces solar energy.
What is fusion?
300
What type of star will the sun be when its cycle ends?
What is a white dwarf?
300
Define a light-year.
What is the distance light travels in one Earth year?
300
Explain why a star in the "white dwarf" stage is considered dead.
What is because it has lost most of its fuel and has become very small and dim?
400
Solar wind.
What are particles thrown into space by the sun?
400
This is evidence that the sun rotates.
What is sunspots move across the sun, disappear, and reappear on the other side?
400
The temperature of a star and its brightness are related because...
What is the hotter the star, the brighter it is?
400
A galactic cluster that contains the Milky Way Galaxy.
What is the Local Group?
400
When an astronaut goes into space he/she needs protection from the sun's energy. Why is this necessary?
What is because the atmosphere on earth protects us from this energy, but once an astronaut is outside the atmosphere he/she needs protection from the sun's energy?
500
Galaxy
What is a group of stars, gas, and dust?
500
We know the sun is the original source of energy for fossil fuels because...
What is the organisms that died long ago depended on the sun for energy?
500
Name the stages of a star's life in order.
What are: nebula, protostar, main sequence star, expanding star, red giant, planetary nebula, and white dwarf?
500
Explain why The Horsehead Nebula does not glow like some nebulae.
What is it must not have a nearby star whose energy waves can be absorbed so it can shine?
500
If a massive, hot blue star was formed about he same time as our sun, tell which star will last longer and why.
What is the sun because a star that is massive uses up hydrogen faster than the sun?