Particle Theory of Matter
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Particle Theory of Matter
Read the evidence
At the dairy shed, Hugo puts a block of ice in a bucket. Later, Tui notices a puddle of water. Sione warms milk in a pot, and a little water vapour rises. The matter changes state, but the particles themselves do not vanish.
- Tiny particles that are always moving
- Large pieces that never move
- Only particles we can see
- Empty space with no particles
- They disappear and new particles form
- They gain energy and move more freely while remaining close together
- They stop moving and lock into place
- They spread as far apart as gas particles
Follow the changes
Heating usually makes particles move faster; cooling usually makes them move slower. Use that idea to interpret the farm observations.
- Water in a puddle freezes
- Ice melts in a bucket
- Water vapour spreads through the air
- Milk cools after heating
- Particles gain energy and move more freely
- Particles lose energy and move more slowly
- Particles lose energy, slow down and settle into fixed positions
- Particles move quickly and spread far apart
- They are fixed in an arrangement and vibrate in place
- They flow around one another freely
- They are spread throughout the whole room
- They do not move at all
3 printable pages
Page 1
Page 2
Page 3
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