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30 Cards in this Set
- Front
- Back
Acceleration
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Change in velocity over time; always produced by force; defined as force divided by mass.
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Acid Rain
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Rain that has dissolved chemicals containing nitrogen and sulfuric acid. Causes damage to ecosystems.
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Activation Energy
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Added energy that starts a chemical reaction.
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Adaptation
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Process of adjusting to a change in environments or to changing environmental conditions.
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Algae
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Plants made of single cells
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Amplitude
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Height of a wave; measure of the energy contained in a wave.
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Anemometer
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Tool used to measure wind speed.
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Anion
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Ion that has a negative charge.
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Asexual reproduction
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Type of reproduction that requires only one parent and does not mix genetic material.
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Astronomical Unit (AU)
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Average distance from the earth to the sun. 1.49 x 10^8 km
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Atomic Mass
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Sum of an atom's protons and neutrons.
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Atomic Number
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Number of protons in an atom's nucleus.
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Atom
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The smallest particle of an element/matter.
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Balanced Chemical Equation
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Chemical equation that has the same number of atoms of each element on both sides of the equation.
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Barometer
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Tool used to measure air pressure.
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Biome
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A habitat containing a given ecosystem.
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Boiling Point
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Temperature at which a material changes between liquid and gas states.
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Carbon
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An element contained in all living things.
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Carbon cycle
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Changes in the form of carbon as it goes from the rocks to the air to the water and back again.
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Carbonate
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Form of carbon that is made when carbon dioxide combines with water.
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Catalyst
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Material that increases the rate of a reaction by lowering the activation energy.
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Cation
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Ion that has a positive charge.
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Cell
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The most basic component of living systems.
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Cell Membrane
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Protective outer layer of the cell.
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Cell Wall
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Rigid structure that provides added protection and support for plant cells.
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Cellular Respiration
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Process by which cells use oxygen and glucose to produce energy, water, and carbon dioxide.
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Chemical bond
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Force that holds atoms together.
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Chemical energy
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Energy created by a chemical reactionor absorbed when a chemical compound is formed.
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Chemical equation
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Way to show a chemical reaction using chemical formulas.
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Chemical formula
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Group of chemical symbols that indicate what elements are in a compound and their ratio.
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