Unit 1 Vocabulary
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| Atom | Smallest particle of an element that still has its properties; made up of protons, neutrons, & electrons
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| Boyle's Law | States that the pressure of a gas will change indirectly with a change in volume (same temperature)
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| Charles' Law | States that the volume of a gas will change directly with a change in temperature (same pressure)
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| Chemical property | Describes how matter reacts or changes, such as flammability
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| Chemical change | Type of reaction in which matter is changes and creates a new substance
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| Chemical formula | Represents a chemical compound, such as HCl or NaF
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| Chemical symbol | Represents a chemical element, such as H or O
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| Compound | Two or more substances that are chemically combined; represented by chemical formulas
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| Density | Calculated by diving an object's mass by its volume
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| Element | Simplest pure substance, represented by a chemical symbol
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| Mass | Amount of matter in an object; does not change with changes in gravity
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| Matter | Any substance that has mass and volume;
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| Mixture | Two or more substance mixed together but not chemically combined; may be separated by physical means
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| Physical property | Describes the appearance and other characteristics of matter
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| Physical change | Change in size, shape, or state; does not create a new substance
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| Solution | Mixture in which one substance is dissolved in another, such as lemonade or Kool-Aid
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| Volume | Amount of space an object takes up
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| Phase (State) | Form for matter with varying levels of thermal energy; solids, liquids, and gases
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| Vaporization | Occurs when a liquid changes into a gas; may be evaporation or boiling
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| Sublimation | Occurs when a gas turns to a solid or solid turns to a gas without going through the liquid phase
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| Endothermic | Reaction or change that absorbs energy during the process
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| Exothermic | Reaction or change that gives off energy during the process
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| Melting | Solid turning into a liquid from a gain of thermal energy
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| Freezing | Liquid turning into a solid from a loss of thermal energy
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| Boiling | Type of vaporization that occurs throughout a liquid; such as water turning into steam
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| Evaporation | Type of vaporization that occurs at the surface of a liquid; such as water turning into water vapor at the surface of a puddle
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| Condensation | Gas turning into a liquid from a loss of thermal energy; such as water vapor turning into water droplets in a cloud
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| Solid | Phase of matter with a definite shape and volume
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| Liquid | Phase of matter with a definite volume, but no definite shape as it takes the shape of its container
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| Gas | Phase of matter that does not have a definite shape or volume as it takes up any available space
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| Weight | Measure of the force of gravity acting on an object; changes with changes in gravity (such as weighing less on the moon)
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| Marshmallow | Fluffy white confection that was used to study Boyle's Law
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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