Question

section 1 stars continued
class color temperature (°c) elements detected
o blue above 30,000 helium
b blue - white 10,000 to 30,000 hydrogen, helium
a blue - white 7,500 to 10,000 hydrogen
f yellow - white 6,000 to 7,500 hydrogen and heavier elements
g yellow 5,000 to 6,000 calcium and heavier elements
k orange 3,500 to 5,000 calcium and iron
m red less than 3,500 molecules, such as titanium dioxide
take a look

1. identify a scientist discovers a star that is blue - white and is made of hydrogen. which class should the scientist put the star in?
2. identify which class has hotter stars—g or b?

Explanation:

Step1: Analyze star characteristics for Q6

The star is blue - white and made of hydrogen. Comparing with table, it fits class B.

Step2: Analyze star temperatures for Q7

Class B stars have temperature 10,000 - 30,000°C and class G stars have temperature 5,000 - 6,000°C. Higher temperature means hotter star, so B is hotter.

Answer:

1. B
2. B