You Observe a Red Star and a Blue Star and Are

question 82

Multiple Choice

You observe a red star and a blue star and are able to determine that they are the same size. Which star is hotter, and which star is more luminous?

• A) The red star is hotter and more luminous.
• B) The red star is hotter, and the blue star is more luminous.
• C) The blue star is hotter and more luminous.
• D) The blue star is hotter, and the red star is more luminous.
• E) They have the same luminosities and temperatures.

---

Definitions:

High Heat Capacity

The property of a substance that allows it to absorb a considerable amount of heat without undergoing a significant change in temperature.

Carbonic Acid

A weak acid formed in solution when carbon dioxide dissolves in water.

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in the air and is absorbed by plants in photosynthesis.

Baking Soda

A chemical compound also known as sodium bicarbonate, used in baking as a leavening agent and for cleaning.