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_______ was the first person to propose the idea of moving continents as a scientific hypothesis. A. Antonio Snider-Pelligrini B. Alfred Wegener C. Charles Richter D. Abraham Ortelius
Weegy: D. Abraham Ortelius was the first person to propose the idea of moving continents as a scientific hypothesis. (More)
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Expert Answered
Updated 9/15/2014 1:07:31 AM
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It's wrong
Added 9/15/2014 12:32:01 AM
Flagged by jeifunk [9/15/2014 1:08:10 AM]
Alfred Wegener was the first person to propose the idea of moving continents as a scientific hypothesis.
Added 9/15/2014 1:07:29 AM
This answer has been confirmed as correct, not copied, and helpful.
Which variable stars have pulsation periods between 1.5 hours and 1.2 days? A. Protostars B. RR Lyrae variables C. Nebulas D. Cepheid variables
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Expert Answered
Updated 10/23/2013 1:37:09 PM
1 Answer/Comment
The stars that have pulsation periods between 1.5 hours and 1.2 days are C. RR Lyrae variables

"Their period is shorter, typically less than one day, sometimes ranging down to seven hours."


The others :
A. Cepheid variables - have periods of many days
B. Protostars - are variable in the T-Tauri stage, but they are very hard to observe for most observers and period is longer
D. Nebulas - a nebula is not a star
Added 10/23/2013 1:37:09 PM
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