BIOLOGY 93 UCI MIDTERM 1 KEY
TERMS STUDY GUIDE 100% VERIFIED.
Hypothesis - ANS a tentative answer to a well framed question - an explanation on trial
Prediction - ANS A logical statement about what will happen if the hypothesis is correct.
Experiment - ANS a repeatable procedure that is used to test a hypothesis (a scientific test
carried under controlled condition)
Variable - ANS factors that vary in an experiment
Controlled Experiment - ANS An experiment in which all factors are identical except the one
being tested. Compares an experimental group with a control group
Independent Variable - ANS the factor manipulated by the researchers
Dependent Variable - ANS a factor that is measured in the experiment
Theory - ANS 1)Broader than a hypothesis. 2)broad enough to spin off many new hypotheses
that can be tested. 3) Supported by a great body of evidence
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,Science - ANS an approach to understanding the natural world
Element - ANS is a chemical substance that cannot be broken down to other substances
Compound - ANS a substance consisting of 2 or more different elements combined in a fixed
ratio.
Neutron - ANS a atomic particle that is electrically neutral (0)
Proton - ANS a atomic particle with one unit of positive charge
Electron - ANS a atomic particle with one unit of negative charge
Atom - ANS smallest unit of matter that still retains the properties of an element. Made up of
a neutron/proton nucleus, and shell(s) of electrons
Covalent Bond - ANS is the sharing of a pair of valence electrons by two atoms.
Molecule - ANS two or more atoms held together by covalent bonds constitute a molecule
Single bond - ANS a covalent bond in which two atoms share one pair of electrons
Double Bond - ANS a covalent bond produced by the sharing of two pairs of electrons
between two atoms
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, Valence - ANS Electrons on the outermost energy level of an atom: electrons that form
bonds.
Electronegativity - ANS Atom's ability to attract and hold electrons.
Non polar Covalent Bond - ANS a bond where electrons are shared equally among two atoms
or where symmetric structure causes polarity to cancel out.
Polar Covalent Bond - ANS Where asymmetric structure and unequal sharing of electrons
between two atoms with different electronegativity values create partial charges within the
molecule.
Ionic Bond - ANS When an electron is attracted to another atom of higher electronegativity
and the resulting charges create a ionic attraction.
Ion - ANS A charged atom or group of atoms that is charged due to a net loss or gain of
electrons
Cation - ANS a positively charged ion
Anion - ANS a negatively charged ion
Salt - ANS A compound resulting from the formation of ionic bonds; also called an ionic
compound
Hydrogen Bond - ANS a weak interaction involving a hydrogen atom and a fluorine, oxygen,
or nitrogen atom
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
TERMS STUDY GUIDE 100% VERIFIED.
Hypothesis - ANS a tentative answer to a well framed question - an explanation on trial
Prediction - ANS A logical statement about what will happen if the hypothesis is correct.
Experiment - ANS a repeatable procedure that is used to test a hypothesis (a scientific test
carried under controlled condition)
Variable - ANS factors that vary in an experiment
Controlled Experiment - ANS An experiment in which all factors are identical except the one
being tested. Compares an experimental group with a control group
Independent Variable - ANS the factor manipulated by the researchers
Dependent Variable - ANS a factor that is measured in the experiment
Theory - ANS 1)Broader than a hypothesis. 2)broad enough to spin off many new hypotheses
that can be tested. 3) Supported by a great body of evidence
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Science - ANS an approach to understanding the natural world
Element - ANS is a chemical substance that cannot be broken down to other substances
Compound - ANS a substance consisting of 2 or more different elements combined in a fixed
ratio.
Neutron - ANS a atomic particle that is electrically neutral (0)
Proton - ANS a atomic particle with one unit of positive charge
Electron - ANS a atomic particle with one unit of negative charge
Atom - ANS smallest unit of matter that still retains the properties of an element. Made up of
a neutron/proton nucleus, and shell(s) of electrons
Covalent Bond - ANS is the sharing of a pair of valence electrons by two atoms.
Molecule - ANS two or more atoms held together by covalent bonds constitute a molecule
Single bond - ANS a covalent bond in which two atoms share one pair of electrons
Double Bond - ANS a covalent bond produced by the sharing of two pairs of electrons
between two atoms
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Valence - ANS Electrons on the outermost energy level of an atom: electrons that form
bonds.
Electronegativity - ANS Atom's ability to attract and hold electrons.
Non polar Covalent Bond - ANS a bond where electrons are shared equally among two atoms
or where symmetric structure causes polarity to cancel out.
Polar Covalent Bond - ANS Where asymmetric structure and unequal sharing of electrons
between two atoms with different electronegativity values create partial charges within the
molecule.
Ionic Bond - ANS When an electron is attracted to another atom of higher electronegativity
and the resulting charges create a ionic attraction.
Ion - ANS A charged atom or group of atoms that is charged due to a net loss or gain of
electrons
Cation - ANS a positively charged ion
Anion - ANS a negatively charged ion
Salt - ANS A compound resulting from the formation of ionic bonds; also called an ionic
compound
Hydrogen Bond - ANS a weak interaction involving a hydrogen atom and a fluorine, oxygen,
or nitrogen atom
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
