TCC NORFOLK BIO 101 EXAM 1 | MURRAY
BIOLOGY STUDY GUIDE & EXAM PREP
Homeostasis - correct answer the body's ability to maintain relatively stable internal
conditions, even though the outside world changes continually; the ability of an
organism to maintain constant internal conditions
Independent Variable - correct answer the component that you're actually testing to see
what will happen; variable that you directly manipulate (and causes change)
Dependent Variable - correct answer usually something you measure to know what your
independent variable did; the change that happens dependent/based on what I did;
measurable
Standardized Variables - correct answer all outside factors that may affect your results
and must keep these the same every time you do the experiment; also called constants
or controls
Control - correct answer the part of the experiment that doesn't change
Hypothesis - correct answer an educated guess in statement form (NOT a question)
that is testable and falsifiable; should include the independent and dependent variables
Theory - correct answer repeatedly tested a hypothesis and almost always get the same
results
-Homeostasis is the body's ability to maintain internal constancy despite changes in the
environment
-If our bodies cannot maintain homeostasis, then we die - correct answer What is
homeostasis? What happens if our body cannot maintain homeostasis?
-Hypothesis: an educated guess that can be tested
-Theory: repeatedly tested, generally accepted, and confirmed explanation for why
things happen based on evidence
-Law: describes what will happen 100% of the time and is backed and proven by math
(in mathematical formulas) - correct answer What is the difference between scientific
hypothesis, theories, and law?
Elements - correct answer a pure substance that cannot be broken into simpler
substances by ordinary chemical methods; each has unique properties; made up of
atoms
, Atoms - correct answer smallest particles of an element with properties of that element;
give each element its physical and chemical properties; unique building blocks for each
element; has a constant # of protons; combine with other atoms to form molecules
Molecule - correct answer 2 or more atoms bonded together
Proton - correct answer positively charged particle that resides in the nucleus of an
atom with a mass of 1 and a charge of +1
Electron - correct answer negatively charged particle that travels in the space around
the nucleus with negligible mass and a charge of -1
Neutron - correct answer particle that carries no charge (neutral) and resides in nucleus
with a mass of 1 and no charge
Electron Orbit - correct answer the path of an electron around the nucleus of an atom
Atomic Number - correct answer equal to the # of protons and neutrons an element
contains
Atomic Symbol - correct answer abbreviated name/symbol for a given element
Valence Shell - correct answer the outermost electron shell
Ion - correct answer atoms with a charge due to gaining or losing an electron from their
valence shell (# of electrons are no longer equal to # of protons in that atom)
-Atoms: make up an element (smallest component of an element)
-Elements: pure substances that can't be broken into simpler substances by ordinary
chemical methods
-Main difference from one element to another: the # of protons in the nucleus - correct
answer What are atoms and elements? What's the main difference between one
element and another?
-Protons: positively charged
-Neutrons: no charge
-Electrons: negatively charged
-Protons determine what type of element an atom will be
-Electrons (in valence shell) determine if an atom is reactive or not - correct answer
What's the difference between protons/neutrons/electrons? Which determines what type
of element an atom will be? What determines if an atom is reactive or not?
-Stable: valence shell is complete/full
-Neutral: net charge of zero; equal # of protons and electrons (all elemental forms are
neutral) - correct answer Stable vs. Neutral
BIOLOGY STUDY GUIDE & EXAM PREP
Homeostasis - correct answer the body's ability to maintain relatively stable internal
conditions, even though the outside world changes continually; the ability of an
organism to maintain constant internal conditions
Independent Variable - correct answer the component that you're actually testing to see
what will happen; variable that you directly manipulate (and causes change)
Dependent Variable - correct answer usually something you measure to know what your
independent variable did; the change that happens dependent/based on what I did;
measurable
Standardized Variables - correct answer all outside factors that may affect your results
and must keep these the same every time you do the experiment; also called constants
or controls
Control - correct answer the part of the experiment that doesn't change
Hypothesis - correct answer an educated guess in statement form (NOT a question)
that is testable and falsifiable; should include the independent and dependent variables
Theory - correct answer repeatedly tested a hypothesis and almost always get the same
results
-Homeostasis is the body's ability to maintain internal constancy despite changes in the
environment
-If our bodies cannot maintain homeostasis, then we die - correct answer What is
homeostasis? What happens if our body cannot maintain homeostasis?
-Hypothesis: an educated guess that can be tested
-Theory: repeatedly tested, generally accepted, and confirmed explanation for why
things happen based on evidence
-Law: describes what will happen 100% of the time and is backed and proven by math
(in mathematical formulas) - correct answer What is the difference between scientific
hypothesis, theories, and law?
Elements - correct answer a pure substance that cannot be broken into simpler
substances by ordinary chemical methods; each has unique properties; made up of
atoms
, Atoms - correct answer smallest particles of an element with properties of that element;
give each element its physical and chemical properties; unique building blocks for each
element; has a constant # of protons; combine with other atoms to form molecules
Molecule - correct answer 2 or more atoms bonded together
Proton - correct answer positively charged particle that resides in the nucleus of an
atom with a mass of 1 and a charge of +1
Electron - correct answer negatively charged particle that travels in the space around
the nucleus with negligible mass and a charge of -1
Neutron - correct answer particle that carries no charge (neutral) and resides in nucleus
with a mass of 1 and no charge
Electron Orbit - correct answer the path of an electron around the nucleus of an atom
Atomic Number - correct answer equal to the # of protons and neutrons an element
contains
Atomic Symbol - correct answer abbreviated name/symbol for a given element
Valence Shell - correct answer the outermost electron shell
Ion - correct answer atoms with a charge due to gaining or losing an electron from their
valence shell (# of electrons are no longer equal to # of protons in that atom)
-Atoms: make up an element (smallest component of an element)
-Elements: pure substances that can't be broken into simpler substances by ordinary
chemical methods
-Main difference from one element to another: the # of protons in the nucleus - correct
answer What are atoms and elements? What's the main difference between one
element and another?
-Protons: positively charged
-Neutrons: no charge
-Electrons: negatively charged
-Protons determine what type of element an atom will be
-Electrons (in valence shell) determine if an atom is reactive or not - correct answer
What's the difference between protons/neutrons/electrons? Which determines what type
of element an atom will be? What determines if an atom is reactive or not?
-Stable: valence shell is complete/full
-Neutral: net charge of zero; equal # of protons and electrons (all elemental forms are
neutral) - correct answer Stable vs. Neutral
