Question

3. The difference in the brightness of two stars with the same surface temperature is

attributable to their
A ages
B densities
c colors
D sizes

Answer 1

Answer: D, there sizes.
Explanation: If you were to put two stars next to each other with the same temperature but in which one was double the size, you would obviously notice the bigger one is brighter because of it’s sheer size. :)

Answer 2

the answer is D sizes