Year Seven Chemisty Revision Flashcards
Give examples and the properties of solids
Properties: Definite shape and volume, particles are tightly packed and only vibrate in place.
Examples: Ice, diamond, wood.
Give examples and the properties of liquids
Properties: Definite volume but no definite shape, particles are close but can move past each other.
Examples: Water, oil, juice.
Give examples and the properties of gasses
Properties: No definite shape or volume, particles are far apart and move freely.
Examples: Air, helium, water vapor.
What are the five changing states of matter?
Melting, Freezing, Evaporation, condensation, sublimation and deposition
What is melting?
When a solids melts to a liquid
What is freezing?
When a liquid freezes to a solid
What is evaporation?
When a liquid changes to a gas
What is condensation?
When a gas changes to a liquid
What is sublimation?
When a solid turns into a gas
What is deposition?
When a gas turns into a solid
What is the particle model of a solid?
Solids have tightly packed particles.
What is the particle model of a liquid?
Liquids have loosely packed particles.
What is the particle model of a gasses?
Gasses have particles that are far about and move around all over the place.
What is a physical changes?
When a substance changes state or appearance, without changing the substance itself
What is a chemical change?
A change that forms a new substance.
What is a chemical reaction?
The processes where reactants transform into products, often involving energy changes.
What is a mixture?
The combination of two or more substances that are not chemically bonded
What is a solution?
Homogeneous mixtures where one substance is dissolved in another.
What is a suspension?
Heterogeneous mixtures where particles are dispersed but not dissolved.
What is a soluble?
A substance that do not dissolve in a solvent.
What is insoluble?
A substance that do not dissolve in a solvent.
What is a metal?
Typically shiny, good conductors of heat and electricity, malleable.
What is a non-metal?
Usually not shiny, poor conductors, brittles.
What is a pure substance?
Substances with a fixed composition and distinct properties.
What is dilution?
Dilution is the process of decreasing the concentration of a solute in a solution
What is a solute
The substance that dissolves in a solvent.
What is a solvent
The substance that has a solute added to.
What is a mixture?
A material made up of two or more different chemical substances which can be separated by physical method
