Fill in the Blanks How we identify matter. Fill in the blanksOnline version How we identify matter. Fill in the blanks by Miguel Angel Preciado Lopez 1 density elasticity boiling melting colours point solubility resistant magnetism a . Objects or substances can be different shades of . b . How an object is to pressure is called hardness . c . The ability of an object or substance to return to its original shape after removing pressure is called . d . The ability of certain substances to attract metals is called . e . The amount of mass per unit of volume in an object is called . f . When a substance dissolves in another substance and forms a solution is called . g . The temperature at which a solid changes to a liquid is called . h . The temperature at which a liquid changes to a gas is called point .