Welcome to the Change Challenge! Today we're going to play a game about changes in materials You'll decide if each change is physical or chemical Are you ready to be a science detective?
What's the Difference? Physical change: The material looks different but is still the same substance Chemical change: The material turns into a new substance
Ice Melting When ice melts, it changes from solid to liquid But it's still water - just in a different form Is melting ice a physical or chemical change? Physical Change
Rusting Iron When iron rusts, it combines with oxygen in the air It forms a new substance called iron oxide Is rusting a physical or chemical change? Chemical Change
Your Turn: Cutting Paper When you cut paper, you change its shape Is it still paper? Physical or chemical change? Physical Change
Your Turn: Baking a Cake When you bake a cake, the batter changes Physical or chemical change? Chemical Change
Fireworks Fireworks involve burning chemicals Is a fireworks display a physical or chemical change? Chemical Change
Boiling Water When water boils, it turns into steam Is it still water? Physical or chemical change? Physical Change
Mixing Baking Soda and Vinegar When you mix baking soda and vinegar, they fizz A new substance is created Physical or chemical change? Chemical Change
Cooking an Egg When you cook an egg, it changes color and texture Is cooking an egg a physical or chemical change? Chemical Change
Crumpling Paper When you crumple paper, you change its shape But is it still paper? Physical or chemical change? Physical Change
Burning Wood When wood burns, it turns to ash and smoke Are these new substances? Physical or chemical change ? Chemical Change
Breaking Glass When glass breaks, it changes shape But each piece is still glass Is breaking glass a physical or chemical change? Physical Change
Leaves Changing Color When leaves change color in fall, chemicals in them change New pigments are created Is this a physical or chemical change? Chemical Change
Melting Chocolate When chocolate melts, it becomes liquid Physical or chemical change? Physical Change
Milk Turning Sour When milk turns sour, it smells and tastes different Has it become a new substance? Physical or chemical change ? Chemical Change
Congratulations, Science Detectives! You've learned to spot physical and chemical changes Remember: Physical changes don't make new substances Chemical changes do make new substances What changes will you notice in the world around you?