Shrinking Ice Sheets

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Across
  1. 2. What can be hundreds or thousands of years old?
  2. 3. What percent of land area has glacial ice?
  3. 4. What rising thing does melting ice add to?
  4. 7. What entity does the process of calving affect?
Down
  1. 1. What is the word describing how warm or cold the oceans can be?
  2. 3. What are large bodies of ice on land?
  3. 5. What could have no ice in the summers by 2024?
  4. 6. What is one of the two areas that have many ice sheets?