Why do we add HCl to zinc in the lab?
What's the reaction behind it?
Falling objects
If we drop a hammer and a feather on the Moon, which lands first?
Why does an iron nail turn brown in copper sulfate solution?
Is this magic or chemistry?
Escape velocity
What speed must a rocket reach to leave Earth's gravity?
Why do food packets have “silica gel” inside?
What's the chemistry behind it?
Artificial gravity
Can we create gravity in a spaceship?
Why does limewater turn milky when CO₂ is passed?
What forms the white color?
Satellites
Why don't satellites fall back to Earth?
What are exothermic and endothermic reactions?
How to know which is which?
Weight vs mass confusion
If you take a 5 kg brick to the Moon, what happens to its weight and mass?
Why do some reactions need catalysts?
Can't reactions happen on their own?
Black holes
Why is gravity so strong inside a black hole?
Why do fireworks produce different colors?
How does chemistry create those effects?
Sound propagation
Why can't sound travel through space?
Why does lemon taste sour?
What gives fruits and juices their tanginess?
Study Materials
Access comprehensive notes, guides, and resources to excel in your studies