volume - the amount of space, mass - the amount of matter, weight - the measure of the force of gravity, density  - is the amount of mass per unit of volume, how we identify the types of matter - with the several properties, colour - different colours, hardness - measure of the resistence, elasticity - ability to return to its original shape, magnetism - the ability who attracts metal, solubility - dissolve in another substance , soluble - dissolves well, insoluble - doesn’t dissolve well, melting point - temperature encreases, thermal conductivity - ability to conduct heat, electrical conductivity - ability to conduct electrical current , some objects float or sink - cause density, gravity and bouyancy, gravity - is a downward force, bouyancy - is a upward force, an object float if - water is denser , an object sink if - the object is denser,

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