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Author Question: The Earth's atmosphere and magnetosphere contribute ________ to the total mass of the Earth. Fill ... (Read 90 times)

captainjonesify

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on: Jul 27, 2018
The Earth's atmosphere and magnetosphere contribute ________ to the total mass of the Earth.
 
  Fill in the blank(s) with correct word

Question 2

How is the age of a star cluster determined?
 
  What will be an ideal response?


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ambernicolefink

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Reply #1 on: Jul 27, 2018
Answer to Question 1

Less than 0.1

Answer to Question 2

The stars are plotted on an H-R diagram. Note is made of the mass of the stars which are just turning off the main sequence and becoming red giants. The age of these stars is the age of the cluster. Basically, the lower down the main sequence we find stars evolving into the giant branch, the older the cluster is.


captainjonesify

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Reply 2 on: Jul 27, 2018
Wow, this really help

irishcancer18

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Reply 3 on: Yesterday
Excellent

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