matter
examples of physical change
- freezing of water - melting of ice - the formation of clouds, rain, and fog
Assumptions of Particle Theory of Matter (4)
1. All matter is made up of tiny particles. 2. The particles of matter are always moving. 3. The particles have spaces between them. 4. Adding heat to matter makes the particles move faster.
____________________ solids have disorganized arrangement.
Amorphous
____________________ solids have well defined shape and occur in a highly ordered arrangement.
Crystalline
__________________ is the movement of one particle to another.
Diffusion
_________________________________ models the arrangement and movement of particles in solids, liquids and gases. It explains properties of substances in these different states, and what happens during changes of state.
Kinetic molecular theory or particle theory
is anything that has mass and occupies space.
Matter
is defined as force exerted per unit area.
Pressure
Heat is _____________ during melting and evaporation while heat is _________________ during freezing and condensation.
added, released
Gas particles have _______ spaces between them and are far apart from each other thus, you can compress the particles by applying pressure.
big
Solid particles are ______________ packed
closely
The gas particles moving in a ________________ random motion exert pressure.
constant
Solids have _______________ shape and volume.
definite
Solids particles vibrate in ___________ positions
fixed
Flows and diffuse easily.
gas
Are compressible.
gases
Exert pressure.
gases
Have no definite shape and volume.
gases
Flow and diffuse slowly.
liquids
Have definite volume but no definite shape.
liquids
Since gas particles have ______________________ forces of attraction, they fill their container regardless of its shape and volume.
negligible
Solid particles are arranged in an _______________ manner.
orderly
is the smallest unit of matter.
particle
Liquids do not have a definite shape because particles allow them to move and ____________________ one another and take the shape of its container.
slide past
Liquid particles have ___________ spaces between them.
small
Rigid, compact and incompressible.
solid
Matter exists in three main states, namely: ___________________________
solid, liquid and gas
Solid particles are held by ____________ forces of attraction
strong
Solid particles have very ________ spaces in between
tiny
Liquid particles are held by ___________ intermolecular forces of attraction and allow them to occupy a fixed space thus, its volume is definite.
weak
The __________ intermolecular force of attraction and slide past motion of liquid particles allow them to flow and diffuse at a rate slower than gas.
weak