Particle Model & States
In a solid, how are particles arranged and how do they move?
Close together, in order; they vibrate in place.
On a heating curve, what does a flat (plateau) line mean?
A change of state; energy goes into the phase change.
What is diffusion?
Particles spreading out from high to low concentration.
Heat moving by direct touch through a solid is called what?
Conduction
People type “666” in chat. What does it mean?
Awesome / great skills.
Name the three common states of matter.
Solid, liquid, gas.
The temperature where a solid becomes a liquid.
Melting point.
In the tea-in-water diffusion demo, why does color spread without stirring?
Random particle motion spreads the particles.
Warm air rising to the top of a room is an example of what heat transfer?
Convection.
You see “2333” after a joke. What does it mean?
LOL / lots of laughter.
Which state has particles far apart and moving freely?
Gas
The temperature where a liquid becomes a gas.
Boiling point.
A tea bag in warm water vs cold water—where does the color spread faster, and why?
Warm water; particles move faster so diffusion is faster.
Feeling warmth from the sun on your face is which type of heat transfer?
Radiation.
Someone calls a singer “YYDS.” What do they mean?
GOAT / always the best (“forever god”).
When a solid becomes a liquid, what is the process name?
Melting
During melting, why does temperature stop rising for a while?
Energy is used to break particle bonds/change state, not raise temperature.
A tight jar lid loosens after you run warm water over the metal lid. Why?
The metal lid expands when heated, so it loosens.
A metal bowl gets hot from soup, but the air above the soup also moves and spreads heat. Name both heat transfers at work.
Conduction (bowl) and convection (moving warm air).
Friends say they’re just “吃瓜.” What are they doing?
Watching the drama as bystanders (just following the news/gossip).
What is one way the particle model explains a liquid vs a solid?
Liquid particles are close but can slide past each other; solid particles are fixed in order.
Label the melting point and boiling point on a heating curve. (Teacher, draw a heating curve on the board!)
Melting point at the bottom flat line, boiling point at the top flat line.
You put a balloon in the fridge, then take it to a warm balcony. What happens and why?
It shrinks in the fridge (particles move slower) and gets bigger in the warm air (particles move faster → expansion).
A campfire heats you three ways. Name the main one you feel from a distance and one more when you hold your hands close.
Radiation from a distance; convection (rising hot air) or conduction (through a stick/pot) up close.
A classmate said a snack was bad, then ate a lot and said “真香.” What does that mean?
“It’s actually great!” (admitting it’s good after saying it wasn’t).