Earth has layers. Its thin outer crust lies above a thick mantle of hot rock. Deeper down is a metal-rich core. The outer part of the core is liquid, while the inner part is solid. A deep place can be hot without being a liquid ocean of magma.
Earth and geology · Discover & try
What is inside Earth?
Reading level 1 of 5 · EarlyChange
Word help
Mantle
The thick layer of mostly solid rock below the crust.
Outer core
Earth’s liquid, metal-rich layer surrounding the inner core.
Depth
Distance below the surface, distinct from distance from the centre.
Watch · Try · Explain
See how it works
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Approximate radial boundaries; crust thickness varies and its thin edge is highlighted for visibility.
What to look for
- Compare depth with radius.
- Look for the liquid layer.
- Notice how thin the crust is.
Explain what you noticed
A diagram colours the mantle red. Does that prove it is a global liquid magma ocean?
Keep this idea: Earth’s mantle is mostly solid rock; the outer core is liquid and the inner core solid.
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Source material checked 2026-10-28. Explanations and activities by Nepedia. Source links do not imply endorsement.
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