changes in matter Flashcards
physical properties
any characteristic that can be observed using your 5 senses without changing the substance
chemical properties
any characteristic that describes how matter interacts with another substance
biological property
the characteristic of having all 9 features of living things
physical change
change to the physical properties of matter, substance is not changed into a new substance
chemical change
change to the chemical properties of matter, substance is changed into a new substance with new properties, cannot change back
law of conservation of matter/mass
matter cannot be created nor destroyed,
The number of atoms/mass of the reactants equals the number of atoms/mass of the products
phase/state of matter
solid, liquid & gas
changed by changing temperature or pressure
solid
definite shape & definite volume
particles packed together and vibrate but have fixed positions
lower energy
liquid
no definite shape but has definite volume
particles spread apart
medium energy
gas
no definite shape & no definite volume
particles spread far apart
high energy
melting
matter changing from solid to liquid
⬆ energy, ⬆ particle movement
melting point= temperature substance melts at
freezing/solidification
matter changing from liquid to solid
⬇ energy, ⬇ particle movement
freezing point= temperature substance freezes at
vaporization / evaporation
matter changing from liquid to gas
⬆ energy, ⬆ particle movement
boiling point= temperature substance turns to gas at
condensation
matter changing from gas to liquid
⬇ energy, ⬇ particle movement
sublimation
matter changing from solid to gas
⬆ energy, ⬆ particle movement
