3q-science

• matter has mass and take up space
• Atomos is the smallest particle that cannot be crushed anymore
• john dalton = atom
• leucippus and democritus is in believes in atomos
• leucippus and democritus believed that the surrounding are atoms and void
• a molecule is consisting of two or more atoms combined together
• molecules can exits indeoendently
• aristotle believed that the basic basis is these 4 component:

  -fire

  -water

  -air

  -earth
• solid is closely packed together
• liquid is close together
• gases particles are far
• solid has a definite shape and volume
• liquid has a definite volume but takes the shape if its container
• gas has no definite shape or volume
• physical change, it changes only the apperance of a substance not its chemical composition
• chemical change, it can cause a substance to change into a entirely substance with a new chemical formula.
• phase change, it is the process of changing from one physical state to another
• atom is the smallest particle of an element that has all the properties if the element