states, elements, compounds Flashcards
solid
solid is a state of matter that has a fixed shape and volume
liquid
liquid is a state of matter that has a fixed volume, but no fixed shape
gas
gas is a state of matter with no fixed shape or volume
properties
properties are characteristics or features of an object or substance
diffusion
diffusion is the spreading of one substance through another due to the movement of their particles
volume
volume is the amount of space taken up by an object or substance
fluid
fluid is a substance that flows and has no fixed shape. Gases and liquids are fluids.
particle model
a particle model is a description of the moving particles that make up all matter and how they behave. The model explains the properties of solids, liquids and gases.
thermal expansion
thermal expansion is the expansion of material when heated. this is due to the fact of particles expanding when they gain energy.
expands
expands is the increase in size due to the movement of particles in a substance
contracts
contracts is shorten or become smaller in size
alchemists
alchemists is an olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Alchemists also tried to tell the future.
investigations
investigations are activity aimed at finding information
observations
observations is information obtained by the use of our senses or measuring instruments
scientists
scientists are people skilled in or working in the fields of science; scientists use experiments to find out about the material world around them
