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mart [117]
3 years ago
7

How do ice cores, tree rings & index fossils provide valuable information about the past?

History
1 answer:
Assoli18 [71]3 years ago
8 0
Tree rings are annual growth rings and their thickness indicates how growing conditions were for that year. Index fossils in their type and frequency are indicative of the environment that those organisms grew in and how prolific life was then in that environment. Ice cores drilled through glaciers and ice sheets like in Antarctica tell us about such things as the concentration of greenhouse gases like carbon dioxide (as bubbles in the ice layers) and also about climatic  conditions in glacial and interglacial periods.
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How did the entry of the United States into World War I influence the conflict?
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Answer:

It helped Allies stop a German offensive and support a counteroffensive that led to Germany's defeat.

Explanation:

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I know it's not the third one, because obviously the United States entering the war had an effect on it. Even though there was a German blockade we most likely could've gotten through it.

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Mars2501 [29]

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2 years ago
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Feliz [49]

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