definitions Flashcards
force
a push or a pull
resultant force
overall force after considering all the forces acting on an object
pressure
amount of force acting perpendicularly per unit area
work done
transfer of thermal energy through application of a force
law of conservation of energy
energy can be converted from one form to another, but it cannot be created or destroyed
mass
amount of matter in an object
weight
amount of gravitational force acting on an object
temperature
measure of the average kinetic energy of molecules in a body
chemical change
a process where new substance(s) of different chemical properties are formed
combustion
strong burning of a substance in the presence of oxygen to form new compounds
oxidisation
addition of oxygen to a substance (rusting)
thermal decomposition
breakdown of compounds into simpler compounds or elements through strong heating
precipitation
the formation of a solid through the mixing of two aqueous solutions
neutralisation
the reaction between an acid and an alkali
law of conservation of mass
atoms are not created or destroyed in a reaction; they are only rearranged. mass is conserved (unchanged)
