A ten billion year old globular cluster has every star evolved into a giant, with no main sequence stars left
Indicate whether the statement is true or false
FALSE
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____ are star-like objects that contain less than 0.08 solar masses an will never raise their core temperatures high enough that the proton-proton chain can begin. Other minor fusion reactions do occur in these objects. They fall in a gap between the low-mass M dwarf stars and the massive planets in which nuclear fusion never occurs
a. Brown dwarfs b. Herbig-Haro objects c. Bok globules d. T-Tauri star e. Main sequence stars
Scientists suspect changes in the flow of the Sun's Conveyor Belt caused the Sun to be less active in 2008 and 2009 than had been seen in almost 100 years
Indicate whether the statement is true or false
If a hydrogen atom in the ground state absorbs a photon of energy 12.09 eV, to which state will the electron make a transition?
A) n = 4 B) n = 5 C) n = 3 D) n = 2
The ____________________ shows that sunspots are associated with magnetic activity
Fill in the blank(s) with correct word