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* 1. Where is perennial sea ice, the oldest and thickest form of ice, located?

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* 2. True or False: Antarctic sea ice remains largely the same year-round.

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* 3. The melting and freezing of sea ice, particularly surrounding Antarctica, plays a major role in regulating global temperatures by absorbing and reflecting _____.

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* 4. True or False: Because the ice sheets melt and refreeze every year, there is no proof that greenhouse gases are causing melting sea ice.

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* 5. The melting ice cap located in THIS country is now the largest known contributor to sea level rise.

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* 6. Recently, an iceberg the size of which major U.S. city (hint: it’s in the Midwest) broke away from Antarctica in January of this year.

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* 7. Researchers were shocked to find that beneath the almost 500 feet of ice was a thriving ecosystem. Scientists even believe they’ve found multiple new species! How deep did the scientists’ submersible have to travel to reach this freezing ecosystem (which included icefish, coral, octopus, and giant sea spiders just to name a few)?

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* 8. At this level of depth, and without previous exposure to sunlight (due to the 500 feet of ice floating above them), the inhabitants of this dark underwater ecosystem received nutrients from...

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* 9. Meanwhile, in Western Antarctica, a separate crew of scientists and researchers steered an unmanned vehicle into a cavity located under the Dotson ice shelf. As part of this project, they were able to capture never-before-seen images of the underside of the ice sheet. Which of the following accurately describes the appearance of the ice they saw? [Choose all that apply]

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* 10. This texture surprised scientists and suggests that strong _____, which we already know are linked to increased melt rates, are at least part of the reason why the Dotson ice shelf melts so quickly.

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