Particle Model of Matter Flashcards
What are the three states of matter?
Solids, liquids, and gases.
How are the particles in solids arranged?
The particles in solids are closely packed and have fixed positions.
Describe the movement of particles in liquids.
The particles in liquids are closely packed but can move around each other.
How do the particles in gases differ from those in solids and liquids?
The particles in gases have large empty spaces between them and move quickly in all directions.
What is a mixture?
A mixture consists of two or more different materials mixed together.
How can mixtures be separated?
Mixtures can be separated by sieving, filtering, hand sorting, and settling followed by decanting.
What is melting?
Melting is the process where a material changes from a solid to a liquid.
What is a solution?
A solution is a special kind of mixture consisting of a solvent and one or more solutes dissolved in it.
What happens to the solute in a solution?
The solute looks as if it disappears into the solvent because the particles become closely mixed.
What are soluble substances?
: Soluble substances are those that dissolve in water.
How can solutions be separated?
Solutions can be separated by heating, so the solvent evaporates, leaving the dry solute behind.
What is a saturated solution?
A solution is saturated when it has dissolved so much solute that no more can dissolve.
Why are solids like concrete useful for buildings?
Solids like concrete are useful because they cannot be compressed.
What are some examples of liquids at room temperature?
Mercury, petrol, and water are liquids at room temperature.
Why are liquids useful in car brake systems?
Liquids are useful in car brake systems because they flow and cannot be compressed.
