What’s on the Inside the Earth poster
A 4-row table: Layer · What it is like · Roughly.
Earth is not solid rock all the way through. It is four layers, each very different.
- Crust — thin, solid rock — we live on it — 5–70 km thick
- Mantle — hot, slowly flowing rock — 2,900 km thick
- Outer core — liquid iron and nickel — 2,200 km thick
- Inner core — solid iron, hotter than the Sun's surface — 1,200 km radius
The moving liquid outer core is what gives Earth its magnetic field — and makes compasses work.
Questions about the Inside the Earth poster
- What’s on the Inside the Earth poster?
- A 4-row table: Layer · What it is like · Roughly. Earth is not solid rock all the way through. It is four layers, each very different. Crust — thin, solid rock — we live on it — 5–70 km thick; Mantle — hot, slowly flowing rock — 2,900 km thick; Outer core — liquid iron and nickel — 2,200 km thick; Inner core — solid iron, hotter than the Sun's surface — 1,200 km radius. The moving liquid outer core is what gives Earth its magnetic field — and makes compasses work.
- Who is the Inside the Earth poster for?
- Inside the Earth is filed under 3rd Grade (ages 8–9), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting science, and to the parent or teacher answering the question at the kitchen table.
- When should you use the Inside the Earth poster?
- Cut a boiled egg in half. Shell, white, yolk — the same idea. A wall chart earns its place by being glanceable from where the work is happening, so Inside the Earth belongs on the wall where that science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Inside the Earth?
- Adaptations, Forces and Motion and What Living Things Need sit alongside Inside the Earth in the 3rd Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AdaptationsForces and MotionWhat Living Things Need
- Is the Inside the Earth poster free to download and print?
- Yes. Inside the Earth downloads as a free PDF with no account, no email and no watermark, like everything else in the 3rd Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Inside the Earth poster print at?
- Inside the Earth is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Inside the Earth loses nothing.Printing guide
Related posters
Charts that sit alongside Inside the Earth on the same wall.
Browse every 3rd Grade poster, or start from the full catalogue.