| 1. | The influx of food makes the icebound population of algae explode.
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| 2. | The river freezes up in November and stays icebound until May.
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| 3. | It freezes up in late September and stays icebound until June.
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| 4. | The river freezes up in December and remains icebound until March.
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| 5. | The Serebryanka freezes up in November and stays icebound until April.
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| 6. | Karatal freezes up in December and stays icebound until March.
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| 7. | Pyasino freezes up in October and stays icebound until June.
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| 8. | "Icebound " won the 1923 Pulitzer Prize for Drama.
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| 9. | For seven months a year, Nome was icebound.
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| 10. | The Protva freezes up in early December and stays icebound until early April.
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