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Author Question: The cleanest burning and densest type of coal is _______________. Fill in the blank(s) with the ... (Read 43 times)

rachel9

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on: Jul 21, 2018
The cleanest burning and densest type of coal is _______________.
 
  Fill in the blank(s) with the appropriate word(s).

Question 2

The development of deep coal mines required a way to remove groundwater that sometimes flooded the
  mines. This led to the invention of the _______________.


 
  Fill in the blank(s) with the appropriate word(s).


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cici

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Reply #1 on: Jul 21, 2018
Answer to Question 1

anthracite

Answer to Question 2

steam engine


rachel9

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Reply 2 on: Jul 21, 2018
Thanks for the timely response, appreciate it

bimper21

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Reply 3 on: Yesterday
Excellent

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