May 2, 2018 Bellringer: Stellar Evolution and H-R Diagram

All stars the main sequence are middle aged. That is, they are fusing ________ into ________ in their cores.

• hydrogen into helium
• helium into carbon
• oxygen into iron
• helium into hydrogen

How did the elements we have on Earth get here?

• They are all man-made.
• They were formed in stars that eventually exploded in supernova.
• The sun created all of our elements through fusion.
• Elements blew to earth through solar wind.

What is the relationships between the size of a star and its lifetime?

• The larger the star, the shorter the lifetime.
• The larger the star, the longer the lifetime.

Which stage do stars spend the majority of their lives in?

• Nebula Stage
• Main Sequence
• Red Giant Stage
• Dying stage

Why won't our sun ever become a black hole?

• It is too massive
• It is too old
• It is too young
• It is too small

What is the difference between nuclear fusion and nuclear fission?

• Fusion combines smaller nuclei to create larger nuclei and Fission is where a larger nuclei is broken down into smaller nuclei.
• Fission combines small nuclei to create larger nuclei and Fusion is where a larger nuclei is broken down into smaller nuclei.
• Fusion combines electrons and Fission combines neutrons.
• Fission combines electrons and Fusion combines neutrons.

Main sequence stars are...

• the majority of stars in the universe
• the stage when the star fuses Hydrogen into Helium
• neither is correct
• both are correct

The electromagnetic spectrum consists of

• all of the colors of light you can see with your eyes.
• all of the different types of electromagnetic waves.
• a band of colors formed when white light passes through a prism.
• the distance between the crest of one wave and the crest of the next wave.

A range of colors formed when white light passes through a prism is called a

• lens.
• photograph.
• spectrum.
• ray.

Radio waves have ______ wavelengths than waves of visible light.

• shorter
• longer
• the same length