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| A substance made by mixing other substances together |
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| a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance |
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| a usually reversible change in the physical properties of a substance, as size or shape |
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| the volatilization or evaporation and subsequent condensation of a liquid, as when water is boiled in a retort and the steam is condensed in a cool receiver. |
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| liquid that has been passed through a filter. |
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| A machine that separates substances of different densities in a sample by rotating the sample at very high speed, causing the substance to be displaced outward, sometimes through a series of filters or gratings. Denser substances tend to be displaced from the center more than ones that are less dense. |
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| a characteristic that can be observed without changing the identity of the substance |
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| the condition of matter with respect to structure, form, constitution, phase, or the like: water in a gaseous state. |
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| the temperature at which a solid substance melts or fuses. |
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| the temperature at which a substance changes from a liquid to a gas |
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| The mass per unit volume of a substance at a specified pressure and temperature. |
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| a characteristic of a substance that becomes known during a chemical reaction |
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| easily set on fire; combustible |
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| the ability of a substance to react with another substance |
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| One of four main states of matter , similar to a gas, but consisting of positively charged ions with most or all of their detached electrons moving freely about |
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| The amount of heat required to convert a solid at its melting point into a liquid without an increase in temperature. Liquids release the same amount of heat when they solidify |
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| The amount of heat required to convert a liquid into a gas at constant temperature and pressure. A gas releases the same amount of heat when it becomes liquid. |
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| an explanation of how particles behave and move |
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| a measure of the average kinetic energy of it's particles |
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| The total potential and kinetic energy associated with the random motions of the molecules of a material |
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| thermal energy that flows from something at a higher temperature to something at a lower temperature |
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| a substance is the amount of heat needed to raise the temperature of 1 kg of that substance by 1 degree C |
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| change in thermal energy equation |
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increase of speed or velocity
EQUATION: A= (final speed- initial speed) / t
a=changeV/t |
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force is a push or a pull
vector quantity, having both magnitude and direction |
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| combination of two or more forces acting on an object at the same time |
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| forces on an object that are equal in size and opposite in direction |
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| forces acting on an object produce a net force that is not zero |
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| surface resistance to relative motion |
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| The resistance offered by a surface to another surface sliding over it |
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| created between two surfaces when there is no movement |
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| the resistance that occurs when a round object such as a ball or tire rolls on a flat surface |
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| the opposition of the atmosphere to forward movement |
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