chemical reaction - an interaction between two or more substances when a new substance is formed, physical change - a change in matter that does NOT result in a new substance, only a change in the original matter's appearance, solvent - the part of the solution that is doing the dissolving, solute - the part of the solution that is being dissolved, solution - a mixture of two or more substances where one is dissolved into the other, matter - anything that takes up space and has mass, mass - anything that has matter, states of matter - solid, liquid, gas, solid - definite shape and definite volume, liquid - definite volume, takes the shape of it container, gas - no definite shape or volume, open system - a reaction that takes place in an open container will lose mass when a gas is formed, closed system - a reaction that takes place in a closed container will have the same mass after the gas is produced, density - the amount of "stuff" inside an object; a combination of mass and volume, flammability - whether or not an object can burn or light on fire, freezing - change in matter from a liquid to a solid, melting - change in matter from a solid to a liquid, evaporation - change in matter from a liquid to a gas, condensation - change in matter from a gas to a liquid, expand - particles of matter spreading out, contract - particles of matter coming closer together, volume - the amount of space matter takes up, data - information collected and recorded in an investigation, analyze - take a closer look, soluble - matter that can dissolve, insoluble - matter that can not dissolve, observation - using your senses to describe your environment,

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