Particle Theory Flashcards
what is a particle?
- tiny object too small to see with a microscope
- millions of particles = a substance
- all particles have energy
what is density?
how close particles are in a substance
what are the properties of a substance?
properties describe how a substance behaves
- volume
- shape
- density
- compressibility (squashing)
- ability to flow
Most substances can exist in 3 states of matter
what are the 3 states of matter
solid
liquid
gas
name this state of matter
![](https://s3.amazonaws.com/brainscape-prod/system/cm/298/607/054/q_image_thumb.jpg?1488183971)
solid
particles vibrate on the spot
they can’t flow
name this state of matter
![](https://s3.amazonaws.com/brainscape-prod/system/cm/298/607/058/q_image_thumb.png?1488184117)
liquid
particles touch and slide over each so can flow
name this state of matter
![](https://s3.amazonaws.com/brainscape-prod/system/cm/298/607/056/q_image_thumb.png?1488184076)
gas
particles spread out
space between them allows them to flow
Which state of matter has a fixed shape?
solid
Which state(s) of matter have a fixed volume?
solid
liquid
Which state of matter is easy to squash? (compress)
gas
Which state(s) of matter flow easily?
liquid
gas
What is a liquid
something with a fixed volume but no fixed shape
Can particles move in a solid?
No, they’re in a fixed position
Can particles move in a liquid?
Yes, they can move past each other
Can particles move in a gas?
Yes, they can move very quickly because there’s lots of space