Question

1. using the hr diagram provided, answer the following question. what is the approximate color(s) of a star that is currently fusing hydrogen into helium. red yellow orange blue/white

Explanation:

Stars fusing hydrogen into helium are main - sequence stars. Main - sequence stars that are hot and massive (like O, B, A type stars) have a blue/white appearance. Yellow stars (like our Sun) are also main - sequence but have a lower temperature than blue/white main - sequence stars. Red and orange stars are usually in later stages (like red giants) or have lower mass main - sequence stars, but for hydrogen - to - helium fusing main - sequence stars with higher temperature (more massive), blue/white is typical.

Answer:

blue/white (the checkbox next to "blue/white" should be selected)