Chemical reactions

What you'll learn

1. 1

   Imagine you're baking a cake. You mix flour, eggs, sugar and butter — but when you put it in the oven, it changes into something totally different! 🎂

2. 2

   Is baking a cake a chemical reaction? 🎂

3. 3

   Here's what happens in a chemical reaction: the atoms in the ingredients rearrange themselves into new molecules. 🧪

4. 4

   Mix these atoms to make a new molecule — drag the hydrogen and oxygen together to make water! 💧

5. 5

   Burning wood is a chemical reaction. Let's see what happens. 🔥

6. 6

   Which of these is a sign of a chemical reaction? 🔍

7. 7

   Rust forming on a metal bike — chemical reaction or not? 🚲