Particles Topic 1 Flashcards
What materials can diffuse?
Gasses and liquids
Less dense materials diffuse faster
What is a solution
A homogeneous mixture of a solid (or gas) in a liquid
What is a suspension
A heterogeneous mixture of a solid in a liquid
Homogeneous
A mixture which has uniform composition and properties throughout
Heterogeneous
A mixture that does NOT have uniform composition and properties throughout
What is a emulsion
A heterogeneous mixture of two (or more) liquids
Eg. Oil and water
What is a mist
Minute droplets of a liquid in a gas
What is smoke
Minute droplets of a solid on a gas
What is an alloy
A mixture of two or metals and non-metals
What is a gel
A heterogeneous mixture of a liquid within a solid
What is a meringue
A heterogeneous mixture of a gas within a solid
Eg a sponge
What is a foam
A mass of small bubbles of gas in a liquid
Define an element
A simple substance that cannot be broken down into a simpler substance by chemical means (1 type of atom)
Define a compound
A substance that contains 2 or more elements that have been chemically combined
Define a mixture
Two or more elements/compounds that are not chemically joined, but mixed
What do you call liquids that mix with each other completely (eg milk and tea)
Miscible
What do you call liquids that, when combined, form layers (eg oil and vinegar)
Immiscible
When using filtration, what is residue?
The insoluble liquid left in the filter
When using filtration, what is the filtrate
The liquid that passes through the filter
Gasses can be compressed because …
Their molecules have large spaces between them
What happens during freezing
Particles become more regularly arranged
What is sublimation
Solid —> gas
What is distillation?
The action of purifying a liquid through the process of heating and cooling
What is diffusion
Diffusion is the net movement of particles form areas of high concentration to areas of low concentration until a uniform concentration is achieved
