Lesson plan

A23a

Iceberg A23a was a large tabular iceberg which calved from the Filchner–Ronne Ice Shelf in 1986. It was stuck on the sea bed for many years but then started moving in 2020. its area was about , which made it the largest iceberg in the world. it had run aground off South Georgia island. By July 2025, it had started drifting again. It later passed to the east and north of South Georgia, and in September 2025 it was observed to be breaking up in warmer waters. In March 2026, the largest remnant became small enough that formal monitoring ceased, and as of July 2026 the iceberg was thought to have either disintegrated completely or to be on the verge of doing so.

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Article summary

Iceberg A23a was a large tabular iceberg which calved from the Filchner–Ronne Ice Shelf in 1986. It was stuck on the sea bed for many years but then started moving in 2020. its area was about , which made it the largest iceberg in the world. it had run aground off South Georgia island. By July 2025, it had started drifting again. It later passed to the east and north of South Georgia, and in September 2025 it was observed to be breaking up in warmer waters. In March 2026, the largest remnant became small enough that formal monitoring ceased, and as of July 2026 the iceberg was thought to have either disintegrated completely or to be on the verge of doing so.

Key claims

  1. publication date: 2026 — source: Wikipedia · confidence 0.95

Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. The record states that the publication date is "2026". What evidence would count against this claim?
  3. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  4. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

Bibliography

  1. Wikipedia https://en.wikipedia.org/w/index.php?oldid=1374063893

Key claims and bibliography are generated from the same tracked claims and sources as the article page.