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25 Cards in this Set
- Front
- Back
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Absolute Zero
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approximately -273 degrees C, the lowest possible temperature.
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Acid
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a compound that releases hydrogen (H+) ions when dissolved in water has a pH less than 7.
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Algae
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simple, one-celled plantlike organisms found in water or damp places; includes seaweeds, pond scum, and so on.
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Alloy
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a substance composed of two or more metals.
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Atmosphere
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the layer of air surrounding the Earth.
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Atmospheric pressure
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the pressure exerted by the atmosphere on every part of the earth's surface, approx. 10 newtons per square centimeter.
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Atom
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the smallest part of an element that is recognizable as that element.
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Barometer
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an instrument that measures atmospheric pressure.
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Base
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a compound that releases hydroxide ions (OH-) in water; has a pH greater than 7; is sometimes called an alkali.
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Boiling Point
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the temperature at which additional thermal energy causes a substance to change from a liquid to a vapor.
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Atmospheric pressure
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the pressure exerted by the atmosphere on every part of the earth's surface, approx. 10 newtons per square centimeter.
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Atom
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the smallest part of an element that is recognizable as that element.
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Barometer
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an instrument that measures atmospheric pressure.
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Base
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a compound that releases hydroxide ions (OH-) in water; has a pH greater than 7; is sometimes called an alkali.
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Boiling Point
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the temperature at which additional thermal energy causes a substance to change from a liquid to a vapor.
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Atmospheric pressure
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the pressure exerted by the atmosphere on every part of the earth's surface, approx. 10 newtons per square centimeter.
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Atom
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the smallest part of an element that is recognizable as that element.
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Barometer
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an instrument that measures atmospheric pressure.
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Base
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a compound that releases hydroxide ions (OH-) in water; has a pH greater than 7; is sometimes called an alkali.
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Boiling Point
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the temperature at which additional thermal energy causes a substance to change from a liquid to a vapor.
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Calorie
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a quantity of heat energy; the amount needed to raise the temperature of one gram of water.
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Carbohydrate
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an organic compound like sugar or starch that contains carbon, hydrogen, and oxygen in the ratio 1:2:1; the human body's main source of energy.
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Carcinogen
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a cancer-causing agent.
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Carnivore
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a meat eater
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Catalyst
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a substance that speeds up a chemical reaction w/o being changed by the reaction.
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