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An enormous iceberg that is [necking / heading] toward the island of South Georgia in the southern Atlantic Ocean has broken up into three large chunks. Scientists from NASA have been [tacking / tracking] the berg - dubbed A68a - for [several / severe] weeks. It actually [calved / caved] from the Larsen C ice [case / shelf] in 2017 and has been floating northwards ever [since / for] . In recent weeks, a fast-moving stream of water known [was / as] the Southern Antarctic Circumpolar Current Front has put the chunks on a [trajectory / tragedy] that mean they could run aground off the coast of South Georgia. Scientists say the three fragments are [smoothly / roughly] 2,600 square kilometres in size. The [emerged / submerged] part of one chunk is 106 metres at its thickest point.

The sheer bulk of the three iceberg chunks [posies / poses] a serious [threat / treat] to the wildlife of South Georgia. There could be an environmental [catastrophic / catastrophe] waiting to happen. If the three mini icebergs collide with the seabed, they could [obstruct / destruct] penguins and seals from foraging for fish. They could also block the route between penguin colonies and their [feeding / bleating] grounds during the [bred / breeding] season. Scientists worry the [underside / offside] of the fragments could grind the seabed near South Georgia and disrupt [despicable / delicate] underwater ecosystems. This could be [enunciated / exacerbated] by the introduction of a mass of fresh water to the ecosystems as the [stationary / stationery] fragments melt over the summer months.