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What is the process from a substance going from a solid to a liquid called?
melting
What is the process from a substance going from a liquid to a gas called?
evaporation
What is the process from a substance going from a liquid to a solid called?
freezing
What is the process from a substance going from a gas to a liquid called?
condensing
What is the process from a substance going from a solid to a gas called?
sublimation
What is the process from a substance going from a gas to a solid called?
depositing
Describe the movement, forces and density in solids liquids and gases
solids → vibrating, strong forces and high density liquids → sliding over each other, strong forces and high density gases → moving in straight lines, weak forces and low density
Define atom
smallest unit of matter which retains its properties
Define molecule
a small group of atoms
Define ion
charges atoms / molecules
Define element
a substance made up of the same type of particles
Define compound
a substance made up of 2 or more different types particles that are chemically bonded
Define mixture
a substance made up of 2 or more different types particles that are not chemically bonded
Name 3 physical changes and 2 characteristics of these
• changes of state • dissolving • arrangement change characteristics: • reversibile • no new substances formed
Name 3 chemical changes and 2 characteristics of these
• combustion • neutralisation • oxidation • decomposition • precipitation characteristics: • irreversibile • new substances formed