states of matter
closely packed, geometric particles describes which state of matter
solid
what is the definition of matter
anything that has mass and takes up space
pizza is an example of which composition of matter
heterogeneous
indefinite shape and indefinite volume are characteristics of which state of matter
gas
what is an example of a physical change
melting ice, cutting paper, or breaking glass
a mixture in which two or more substances are uniformly spread out
homogeneous
positively and negatively charged high temperature gas
plasma
when a firework explodes, this is an example of a ________ _____
chemical change
atoms of two or more elements combined
compound
the state of a sample of matter depends on the ___________
temperature
what are two examples of a chemical property
flammable, combustible, may react to light
describe a mixture
materials of two or more substances that can be separated by physical means
what is an exception of the rule "temperature increases and contracts when cooled"
water expands when cooled
says the mass of ALL substances present before a chemical change equals the mass of ALL substances after the change
the Law of Conservation of Mass
explains how particles in matter behave;
all matter is composed of particles
particles are in constant, random motion
particles collide with each other
kinetic theory