Moving Particles
What happens to particles when something gets hotter?
They move faster
Which way does heat always move?
From warm to cool.
True or False: Temperature and heat mean the same thing.
False!
Why does hot cocoa cool down if you leave it out?
The cocoa gives off heat to the air.
In a particle drawing, how can you tell something is hot?
The particles are moving fast and spread out.
What happens to particles when something cools down?
They move slower
What happens when two objects reach the same temperature?
The energy stops moving between them.
Which has more total heat energy — a hot cup of water or a cold swimming pool?
The pool, because it has way more water (particles).
Why does your hand feel warm when you hold a hot cup?
Heat moves from the cup to your hand.
What do arrows in an energy diagram mean?
They show which way the heat is moving.
How are particles arranged in a solid, liquid, and gas?
Solid: packed tight. Liquid: a little apart. Gas: far apart and moving fast.
What is Kinetic Energy?
How fast or slow particles are moving.
How can two things at the same temperature have different amounts of heat energy?
One has more mass or particles.
Why do we put insulation in our houses?
To slow down how fast heat moves in or out.
Why do scientists use models to show heat?
Because we can’t see particles move, so models help us picture it.
What does temperature tell us about the particles?
How fast the particles are moving.
Why does a metal spoon feel colder than a plastic one?
Metal moves heat faster away from your hand.
What happens to energy when hot and cold water mix?
It spreads out until both are the same temperature.
Why does a metal seatbelt buckle get hot fast in the sun?
Metal takes in and moves heat quickly.
What would a model look like if a hot metal cube touched a cold one?
Arrows showing heat moving from the hot cube to the cold one.
If two things have the same temperature, what’s true about their particles?
Their particles are moving at about the same speed.
Why does an ice pack keep getting softer and wetter the longer it sits on your arm?
Because energy keeps moving from your warm arm into the cold ice pack, making the ice melt more and more over time.
Why does adding ice make your drink colder?
Heat moves from the drink to the ice.
How does a frying pan show energy transfer?
Heat moves from the stove → pan → food.
What does “energy is conserved” mean in heat transfer?
The energy isn’t lost — it just moves from one thing to another.