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Physical Science
Chapter 2 (Matter)
Word | Definition |
---|---|
Density | the mass per unit volume of a substance |
Boiling Point | the temperature at which a liquid becomes a gas below the surface |
Melting Point | the temperature at which a solid become a liquid |
Physical Property | a characteristic of a substance that can be observed or measured without changing the composition of the substance |
Evaporation | the change of a substance from a liquid to a gas |
Energy | the ability to change or move matter |
Viscosity | the resistance of a fluid to flow |
Pressure | the force exerted per unit area of a surface |
Immiscible | describes two or more liquids that do not mix into each other |
Miscible | describes two or more liquids that are able to disslove into each other in various proportions |
Sublimation | the change of a substance from a solid to a gas |
Condensation | the change of a substance from a gas to a liquid |
Reactivity | the ability of a substance to combine chemically with another substance |
Chemical Formula | the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance |
Molecule | the smallest unit of a substance that exibits all of the properties and characteristics of that substance |
Compound | a substance made of atoms of more than one element bound together |
Physical Change | a change that occurs in the physical form or properties of a substance that occurs without a chenge in composition |
Atom | the smallest partical that has the properties of an element |
Chemical Change | a change that occurs when a substance changes composition by forming one or more new substances |
Element | a substance that cannot be broken down into simpler substances |
Matter | Anything that has mass and occupies space |
Chemistry | the study of matter and how it changes |
Bouyancy | the force with which a more dense fluid pushes a less dense substance upward |
Chemical Property | the way a substance reacts with others to form new substances with different properties |
Mixture | a combination of more than one pure substance |
Pure Substance | any matter that has a fixed composition and definite properties |