Bio Quiz

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29 Terms
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anything that takes up space and has mass
a substance that cannot be broken down further by a chemical reaction
a substance containing 2 or more elements combined chemically
Essential Elements
essential to survive and reproduce (Carbon, Oxygen, hydrogen, and nitrogen, Phosphate, (CHOPN))
trace element
an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
octet rule
elements will gain lose or share an electron to complete the valence shell and become stable
chemical bond
an attraction between two atoms resulting from the sharing or transfer of valence electrons
the tendency of an atom to attract electrons
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covalent bond
when two or more atoms share electrons
Single Covalent Bond- Double Bond- Triple bond
One pair of share e- Two pairs of shared e- Three pairs of shared e-
Polar bond
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Non Polar
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ionic bond
the attraction between oppositely charged atoms
metal transfers electrons to:
Non metals
a positively charged ion
a negatively charged ion
hydrogen bond
the partially positive atom in one polar covalent molecule will be attracted to an electronegative atom in another polar covalent molecule
intermolecular bond
bond that forms between molecules
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unequal sharing of the electrons that make a polar molecule
attraction of other molecules from molecules of the same kind (responsible for surface tension)
the clinging of one molecule to a different molecule (allows for water to cling to cell walls)
Capillary action
the upwards movement of water due to the forces of cohesion, adhesion, and surface tension. works against gravity and occurs when adhesion is greater than cohesion
High Specific Heat
Water resists change in temperature
Evaporative cooling
water has a high heat of vaporization (Moderates the climate and prevents organisms from overheating)
as water solidifies it expands and becomes less dense
a liquid substance capable of dissolving other substances
the dissolved matter in a solution; the component of a solution that changes its state
a homogeneous mixture of two or more substances; frequently a liquid solution
Ionic Compounds
Partially negative oxygen in water will interact with positive atoms Partially positive hydrogen in water will interact with negative atoms Dissolves ions