describing matter and energy

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Presentation transcript:

describing matter and energy

matter and energy matter: anything that has mass and takes up space energy: ability to do work or cause change energy is used anytime a change in matter occurs

properties of matter property: characteristic two kinds physical properties chemical properties physical and chemical properties are used to identify, describe, and classify matter

physical properties observed without changing the substance into something else examples Color Density Shape Boiling Point Mass can you name others?

chemical properties observed only when substance is changed and interacts with another substance examples flammability: able to burn rusting: combining with oxygen to form rust can you think of others?

physical and chemical properties what is an example of a physical property of a candle? what is an example of a chemical property of a candle?

kinds of matter fundamental kinds of matter interact to form everything around us elements compounds mixtures

elements substances that cannot be broken down into other substances chemically or physically examples sodium oxygen carbon aluminum

compounds substances made of two or more elements combined chemically compounds have properties different from those of the original elements examples water: hydrogen and oxygen salt: sodium and chlorine

mixtures combination of two or more substances that are not chemically combined examples salad frosted cake kool-aid

energy is used anytime a change in matter occurs changes in matter two kinds physical changes chemical changes energy is used anytime a change in matter occurs

physical change alters form or appearance of material, but does not change material into brand new substance examples chopping wood bending wire molding clay phase changes

chemical change produces new substances examples wood burning sour milk

energy many forms mechanical thermal electromagnetic electrical chemical