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Author Question: About what percentage of molecules in the air make up the atmosphere below a 6-kilometer altitude? ... (Read 83 times)

lbcchick

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on: Jul 29, 2018
About what percentage of molecules in the air make up the atmosphere below a 6-kilometer altitude?
 
  A) 20
  B) 30
  C) 40
  D) 50
  E) more than 50

Question 2

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket
 
  A) rises.
  B) falls.
  C) remains the same.


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zenzy

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: E

Answer to Question 2

Answer: C


lbcchick

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


zenzy

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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