Circuit Crossword

Power up your brain with three science crosswords all about heat and electricity.

How to play

• Click a square, or a clue, and type your answer.
• Click the same square again, or press Space, to switch between Across and Down.
• Use the arrow keys to move, and Tab or Enter to jump to the next clue.
• Every word you finish lights up. Fill the whole grid to complete the circuit!

Puzzles

• Electricity: circuits, voltage, current, resistors, fuses and more.
• Heat: conduction, convection, radiation, insulators and temperature scales.
• Heat + Power: filaments, toasters, lightning, solar panels and more, mixing the two topics.

Stuck? Check your letters, or reveal a letter or a whole word.