C1.1.1 Introducing particles Flashcards
Solid
Regular particle arrangement
Particles very close together
Vibrate about fixed position
Liquid
Random particle arrangement
Particles close together
Moved around each other
Gas
Random particle arrangement
Particles far apart
Move quickly in all directions
Particle Model
Describes and shows how the particles in a solid, liquid, or gas are arranged and how they move
Particle
A tiny bit of matter
3 examples of particles:
- atom - ion - molecule
Matter
Anything that has mass
Compress a liquid?
Can’t compress anything in liquid state as there is no space for the particles to move into as they are arranged CLOSE together
Compress a solid?
Can’t compress anything in solid state as there is no space for the particles to move into as they are arranged VERY CLOSE together
Compress a gas?
You can compress anything in gas state as particles are far apart from one another and therefore have space to move into and can be pushed together
Why do scientists use models?
Scientists use models to explain the things they see happening. Used to solve problems, make predictions, and to develop scientific understanding
Why can’t particles in a solid state flow and fill a container?
Cannot flow due to main movement of solid particles
They vibrate about a fixed position
Can’t move from one place to another
Why can particles in a gas state flow and fill a container?
They can flow and completely fill a container
Weak intermolecular forces between gas particles
They can move freely
Why can particles in a liquid state flow and fill a container?
Can take the shape of the container and move freely
Molecules are arranged randomly
Molecules can move around each other
Relative distance is close
When poured, liquid can flow as the particles are not tightly compressed
Molecules = less dense
Why does a solid expand when heated?
Intermolecular forces weaken
= Particles will vibrate more and take up more space
