Word Pairs


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Little is known about the geology of the [very / really] centre of Earth. It was believed our planet had just one core – a scorching hot [amass / mass] of molten rock and gas surrounded [by / on] a solid, rock mantle. The mantle is a [circular / ring] between the earth's crust and core. The core is found 2,900 kilometres below Earth's [surface / top] . It has a [radial / radius] of around 3,485 kilometres. Scientists from the University of Chicago have discovered that there may be a second core [deep / deeply] below our feet. Research has [led / followed] geophysicist Dr Sunyoung Park to believe there is another core. She analyzed data from a 560-km-deep earthquake. Her calculations showed the possibility [of / at] a second core, consisting [of / at] a layer of fluid rock, at the bottom of the mantle.

After Dr Park studied the deep earthquake, she spoke about why she found the Earth's core so [intriguing / conflating] . She said: "Even though the mantle makes [down / up] the largest part of Earth, there's still a lot we don't know about [them / it] ." She added: "There's a lot more we can learn by [usage / using] deep earthquakes as a way to [probe / probate] these questions." Ms Park explained the importance of understanding more about the centre of our planet. She said: "We want to know [exact / exactly] how fast the mantle [blows / flows] because that influences the evolution of the [entire / entirety] Earth. It affects how much heat the planet [retrains / retains] for how long, and how the Earth's materials are cycled over time. Our current understanding is very limited and includes a lot of [assumes / assumptions] ."

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