Science Mid-term

the increase in volume of a material when its temperature increases

process that separates materials based on the size of their particles

ability of a solid to be hammered without shattering

tendancy of a liquid to keep from flowing. Resistance to flowing

substance that cannot be broken down into simpler substances

light given off by the element neon

what causes reaction rates to increase?

type of mixture in which the parts of the mixture are noticeably different from one another

type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another

matter that has the same composition; an element or compound

what happens to the energy of molecules as temperature rises?

who did what to get our current model of an atom

atoms of a given element that have different numbers of neutrons and different mass numbers

time required for one half of a sample of a radioactive isotope to decay

having others critique your experiment

substance that affects the rate of a cheical reaction without being used up in the reaction

phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first

the phase change in which a substance changes from a gas or vapor to a liquid

the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point