The core subjects are compulsory for all students aged 5 to 16 whereas foundation subjects are compulsory at one or more Key Stages.
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IGCSE Core covers essential topics, while IGCSE Extended covers a broader range. The core is less challenging, while Extended requires deeper understanding. The grading scale and eligibility may differ between the two levels.
The Gutenberg Discontinuity, is the boundary, as detected by changes in seismic waves, between the Earth's lower mantle and the outer core about 1800 miles below the surface. It is also called the core-mantle boundary.
Inner core, which is also the innermost region of the Earth.
The inner core has the most or highest amount of density (iron/nickel).
Let's get to the core of the matter. The core of the Earth is supposed to be molten. To prepare the dish, you first have to core several apples.