Sirius Is a Star with Spectral Type a Star and Rigel

question 2

Multiple Choice

Sirius is a star with spectral type A star and Rigel is a star with spectral type B star. What can we conclude?

• A) Rigel has a higher surface temperature than Sirius.
• B) Rigel has a higher core temperature than Sirius.
• C) Sirius has a higher core temperature than Rigel.
• D) Sirius has a higher surface temperature than Rigel.

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Definitions:

Molecular Formulas

A representation of the types and numbers of atoms in a molecule using symbols and numerical subscripts.

Elemental Analysis

A method used to determine the elemental composition of a material or compound.

Line-Angle Formula

A shorthand notation used in organic chemistry to represent chemical structures, where lines represent bonds and vertices represent atoms.

Alcohol

Organic molecules featuring one or more -OH groups bonded to a saturated carbon; common examples include ethanol and methanol.