What’s on the Mars poster
A definition and 5 facts worth remembering.
The red planet — a cold desert world with the largest volcano and the deepest canyon in the solar system.
- Red because the soil is full of rusted iron.
- Olympus Mons is three times the height of Everest.
- Has polar ice caps that grow and shrink with its seasons.
- Its two moons, Phobos and Deimos, are tiny and lumpy.
- Dust storms can cover the entire planet for months.
- Order — 4th
- Day — 24.6 hours
- Year — 687 Earth days
- Moons — 2
- A distinctly orange point of light, brightest every two years or so.
A "day" is one spin. A "year" is one trip round the Sun. On Mars they are nothing like ours.
Questions about the Mars poster
- What’s on the Mars poster?
- A definition and 5 facts worth remembering. The red planet — a cold desert world with the largest volcano and the deepest canyon in the solar system. Red because the soil is full of rusted iron.; Olympus Mons is three times the height of Everest.; Has polar ice caps that grow and shrink with its seasons.; Its two moons, Phobos and Deimos, are tiny and lumpy.; Dust storms can cover the entire planet for months.; Order — 4th; Day — 24.6 hours; Year — 687 Earth days; Moons — 2; A distinctly orange point of light, brightest every two years or so.. A "day" is one spin. A "year" is one trip round the Sun. On Mars they are nothing like ours.
- Who is the Mars poster for?
- Mars is filed under 4th Grade (ages 9–10), 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 Mars poster?
- A distinctly orange point of light, brightest every two years or so. A wall chart earns its place by being glanceable from where the work is happening, so Mars belongs on the wall where that science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Mars?
- Earth, Jupiter and Mercury sit alongside Mars in the 4th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.EarthJupiterMercury
- Is the Mars poster free to download and print?
- Yes. Mars downloads as a free PDF with no account, no email and no watermark, like everything else in the 4th 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 Mars poster print at?
- Mars 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 Mars loses nothing.Printing guide
Related posters
Charts that sit alongside Mars on the same wall.
Browse every 4th Grade poster, or start from the full catalogue.