From meteorite and lunar rock samples, astronomers have ...

[penza]

From meteorite and lunar rock samples, astronomers have determined the age of the Solar System to be ____.
 
  a. 4.6 million years
  b. 10 million years
  c. 2.4 billion years
  d. 4.6 billion years
  e. 8.4 billion years

Question 2

On the H-R diagram, lines of constant radius are illustrated as _____.
 
  a. sloping downward from right to left
 b. sloping downward from left to right
 c. running vertically on the right side
 d. running horizontally on the top
 e. moving in various direction depending on the type of star

[Tabitha_2016]

Answer to Question 1

d

Answer to Question 2

b

[penza]

Thanks for the timely response, appreciate it

[kjohnson]

Gracias!