Action-reaction pairs
When you jump off a boat, why does the boat move backward?
Why do magnesium ribbons burn with a bright light?
Why is it so dazzling?
Why does milk turn sour in summer?
Is it a chemical or physical change?
Friction role
Why do cars have treaded tires instead of smooth ones?
What are redox reactions in daily life?
Are rusting and respiration redox processes?
Force without contact
How does a magnet pull an iron nail without touching it?
Why do effervescent tablets fizz in water?
Why do bubbles form instantly?
Seatbelt safety
Why are seatbelts important in cars?
What's the difference between endothermic and exothermic reactions?
Can you give real-life examples?
Heavy & light fall
Does a heavier ball fall faster than a lighter one?
Why does iron rust faster in coastal areas?
Is saltwater responsible?
Rocket propulsion
How does a rocket move in space where there's nothing to push against?
What is the role of a catalyst?
How does a catalyst speed up a reaction?
Sliding vs rolling friction
Why are ball bearings used in machines?