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When a star is in the process of forming in a molecular cloud, what is the energy source?

You see a cluster of stars of a beautiful rainbow of colors.  Put the colors of stars in the order in which they will die off from the first stars to die to the next and so on. 

What is the size of a star 20 times more massive and `L` times more luminous than our Sun with a surface temperature of `T` K? Please read and comply with the following input instructions. Only use the values exactly as given both in this prompt and the equation sheet for your calculations.  Do not round until your final answer.  Input Instructions: Type your answer rounding to the nearest whole number (30,000) and include the appropriate units (abbreviated with proper capitalization).  Use standard comma placement if necessary. D not use E, or scientific notation, or any words in your answer. For technical difficulties, manually type your answer in the bonus prompt at the bottom. If you do not follow these directions or do not include the units, you will lose points even if your answer is correct. 

We are all made of star stuff!  Put the following elements in sequential order of creation inside of a star. Please note that these are not necessarily all of the elements created inside this star.

Which of the following is a FALSE statement regarding the longest burning phase of a star?

Which of the following is a FALSE statement regarding the longest burning phase of a star?

We are all made of star stuff!  Put the following elements in sequential order of creation inside of a star. Please note that these are not necessarily all of the elements created inside this star.

In this unit, we learned about a very important diagram.  Select all the categories (or branches) depicted on the diagram. Select all that apply.

A white dwarf contains about the mass of __________ and is the size of __________.

In this unit, we learned about a very important diagram.  Select all the categories (or branches) depicted on the diagram. Select all that apply.