Pigpen code: matter and its changes: secret code puzzle for Grade 5, page 1 preview

Secret code puzzle · Science

Pigpen code: matter and its changes · Grade 5

Decode facts about matter and its changes written in the traditional pigpen code, using the grid key. Practices visual matching and careful reading.

Grade 5 · ages 10 to 11
Hard
5 to 10 minutes
1 page
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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What the sheet says

Directions: This is the pigpen code: each letter is the shape of its place in the grids (with or without a dot). Write the letter under each shape.

Code key

What your child practices

Your child practices visual matching and careful reading. The skill is “Matter and its properties”: sort materials into solids, liquids and gases, describe their properties, and explain how heating and cooling cause melting, freezing, evaporation and condensation.

Grades and ages: Grade 5, ages 10 to 11
Time: About 5 to 10 minutes
Subject: Science
Level: Hard for Grade 5
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Read the rules at the top together and try the first step side by side. Use a pencil so mistakes rub out easily, and check every answer at the end. It is one of the harder sheets for Grade 5, best once the basics of the skill are secure.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Start with the shortest coded words; one- and two-letter words crack the code fastest.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.