Predict, test and explain: fizzing raisins, melting ice, magnets, plants, shadows and an egg that survives the drop.

Unit 1 · Matter mysteries

Lesson 1 Dancing Raisins Make a prediction, then test it: gas bubbles can lift things up. 🔒 Finish the lesson before

Lesson 2 Ice Race Run a fair test: salt makes ice melt faster. 🔒 Finish the lesson before

Lesson 3 Where Did the Salt Go? Dissolving: the bits get too small to see, but they are still there. 🔒 Finish the lesson before

Lesson 4 Weigh Before and After Mixing things never makes the weight disappear. 🔒 Finish the lesson before

Lesson 5 Color Change Magic A color change can show a new substance forming. 🔒 Finish the lesson before

Lesson 6 Oobleck: Solid or Liquid? Sort materials by how they behave. 🔒 Finish the lesson before

Unit 2 · Pushes, pulls and magnets

Lesson 7 Ramp Rollers A higher ramp makes a car roll further. 🔒 Finish the lesson before

Lesson 8 Floors and Friction Rough surfaces slow things down: that is friction. 🔒 Finish the lesson before

Lesson 9 Magnet Hunt Magnets pull on iron and steel, not on everything made of metal. 🔒 Finish the lesson before

Lesson 10 Balloon Static Static electricity can pull things without touching. 🔒 Finish the lesson before

Unit 3 · Living things

Lesson 11 Bean in a Bag A seed grows a root first, then a shoot, then leaves. 🔒 Finish the lesson before

Lesson 12 Celery Straws Plants pull water up through tiny tubes. 🔒 Finish the lesson before

Lesson 13 What Plants Eat Plants make their own food from air, water and light. 🔒 Finish the lesson before

Lesson 14 Kitchen Food Web The energy in our food starts with the sun. 🔒 Finish the lesson before

Unit 4 · Light, sound and energy

Lesson 15 Rubber Band Guitar Faster wobbles make higher sounds. 🔒 Finish the lesson before

Lesson 16 Shadow Puppets Light travels in straight lines, and things in the way make shadows. 🔒 Finish the lesson before

Lesson 17 Sun Clock Shadows move and change size as the sun crosses the sky. 🔒 Finish the lesson before

Lesson 18 Ice Cube Jackets Insulators slow down heat moving from one place to another. 🔒 Finish the lesson before

Lesson 19 Lemon Power Electricity flows only around a closed loop: a circuit. 🔒 Finish the lesson before

Unit 5 · Engineer it

Lesson 20 Paper Copters Engineers design, test and improve. 🔒 Finish the lesson before

Lesson 21 Foil Boats A wide boat spreads its load and floats more. 🔒 Finish the lesson before

Lesson 22 Egg Drop Challenge Design within limits, and weigh one choice against another. 🔒 Finish the lesson before

Lesson 23 Spaghetti Tower Triangles make strong shapes. 🔒 Finish the lesson before

Unit 6 · Science fair

Lesson 24 My Science Fair Ask your own question and run a fair test. 🔒 Finish the lesson before