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1
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A substance formed when two or more different elements chemically combine in fixed proportions, such as water (H₂O).
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2
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The process by which gas transforms directly into a solid without becoming a liquid, such as frost forming on a cold surface.
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5
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The process in which a solid changes directly into a gas without first becoming a liquid, such as dry ice turning into carbon dioxide gas.
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6
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Anything that has mass and takes up space; it can exist in different states such as solid, liquid, or gas.
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9
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Characteristics of a substance that can be observed or measured without changing the substance's chemical identity, such as color, density, and boiling point.
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10
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The amount of space that an object occupies, usually measured in liters or cubic centimeters.
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11
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The ability of a substance to undergo a chemical reaction with another substance, indicating how easily it can combine with other materials.
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13
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The distinct forms that matter can take, primarily solid, liquid, gas, and plasma, each with different properties.
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1
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A characteristic of a substance that can only be observed during a chemical reaction, indicating how a substance interacts with other substances.
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3
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A pure substance that cannot be broken down into simpler substances by chemical means, made up of only one type of atom.
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4
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A combination of two or more substances that are not chemically bonded, maintaining their individual properties, such as a salad or air.
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7
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A measure of the amount of matter in an object, typically measured in grams or kilograms.
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8
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The mass of a substance per unit volume, often expressed as grams per cubic centimeter (g/cm³).
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12
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The force exerted by gravity on an object, which depends on the mass of the object and the gravitational pull.
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14
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The smallest unit of an element that retains the properties of that element, consisting of protons, neutrons, and electrons.
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