Answer:
C. The reader’s comment is not a credible source because nothing is known about the person who wrote the comment.
Explanation:
Answer:
B
Explanation:
dark blue all over the continent
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The biosphere is composed of all living organisms. Biosphere is a region of the earth's surface where all living organisms are able to live.
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The Rocky Mountains are described as younger because the Rocky's are really two mountain chains. The older mountain chain started billions of years ago, and the younger mountain chain pushed the older mountain chain up more, only 60 millions years ago.
Answer: Principle of Superposition
Explanation: In an otherwise undisturbed sequence of sedimentary strata, or rock layers, the layers on the bottom are the oldest and layers above them are younger. Principle of Original Horizontality: Layers of rocks deposited from above, such as sediments and lava flows, are originally laid down horizontally. Hope this helps!
