Why do we get boiling curves?
Water particles move at a certain temperature so everyone usually get similar temperatures.
What's happening to the particles?
The water particles are slowly moving more due to the temperature rising.
Whats happening to the particles at different stages?
Stage A: The particles are arranged neatly this means it is in solid form. It's still in a solid form because the heat isn't high enough.
Stage B: It definitely has more energy than stage A, at this point, the particles are moving more and slowly moving apart from each other because the temperature is rising, at this point the particles are in a liquid form.
Stage C: The particle has reached it's boiling point so it can no longer exceed the temperature because the particles are so away from each other they're turning into steam.
Are they moving more or moving less?
As the temperature rises, they move more due to heat, heat makes them have more kinetic energy making them move more.
Why does it not reach 100 degrees celsius?
It can't reach 100 degrees because it is the boiling point of water and so the particles are starting to move apart from each other so much that they eventually evaporate into steam.