SVSU BIO 111 LECTURE EXAM 1
radioactive isotope - ✔️✔️An isotope (an atomic form of a chemical element) that is
unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
Chemical bonds - ✔️✔️An attraction between two atoms resulting from a sharing of
outer-shell electrons or the presence of opposite charges on the atoms. The bonded
atoms gain complete outer electron shells.
covalent bond - ✔️✔️A chemical bond formed when two atoms share electrons
ionic bond - ✔️✔️the attraction between oppositely charged ions
Hydrogen bonds - ✔️✔️Very weak bonds; occurs when a hydrogen atom in one
molecule is attracted to the electrostatic atom in another molecule
Fact - ✔️✔️A statement that can be proved.
independent variable - ✔️✔️variable that is manipulated
dependent variable - ✔️✔️The outcome factor; the variable that may change in
response to manipulations of the independent variable
experimental bias - ✔️✔️a mistake in the design of an experiment that makes a
particular result more likely
Pseudoscience - ✔️✔️A fake or false science that makes claims based on little or no
scientific evidence.
Matter - ✔️✔️Anything that has mass and takes up space
Mass - ✔️✔️A measure of the amount of matter in an object
Element - ✔️✔️A substance that cannot be broken down into simpler substances
Compounds - ✔️✔️2 or more elements chemically combined in a fixed ratio
Atoms - ✔️✔️smallest unit of matter
Molecule - ✔️✔️two or more atoms held together by covalent bonds
, subatomic particles - ✔️✔️protons, neutrons, electrons
Proton - ✔️✔️Positive charge found in nucleus
Electron - ✔️✔️negatively charged particle found in electron cloud
Neutron - ✔️✔️A small particle in the nucleus of the atom, with no electrical charge
atomic number - ✔️✔️the number of protons in the nucleus of an atom
mass number (atomic mass) - ✔️✔️The sum of protons and neutrons in the nucleus of
an atom
Isotopes - ✔️✔️Atoms with the same number of protons but different numbers of
neutrons
Science - ✔️✔️an approach to understanding the natural world
control group - ✔️✔️Lacks or doesn't receive the factor being teseted
experimental group - ✔️✔️the group in an experiment that receives the variable being
tested
peer review - ✔️✔️evaluation of scientific, academic, or professional work by others
working in the same field.
Theory - ✔️✔️Comprehensive and well substantiated explanation , broader in scope
than hypothesis
Cohesion - ✔️✔️an attraction between molecules of the same substance
Acid - ✔️✔️compound that forms hydrogen ions (H+) in solution
Base - ✔️✔️A substance that decreases the hydrogen ion concentration in a solution.
pH scale - ✔️✔️A range of values used to express the concentration of hydrogen ions
in a solution
Buffers - ✔️✔️substances that minimize changes in pH
organic compounds - ✔️✔️carbon-based molecules
radioactive isotope - ✔️✔️An isotope (an atomic form of a chemical element) that is
unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
Chemical bonds - ✔️✔️An attraction between two atoms resulting from a sharing of
outer-shell electrons or the presence of opposite charges on the atoms. The bonded
atoms gain complete outer electron shells.
covalent bond - ✔️✔️A chemical bond formed when two atoms share electrons
ionic bond - ✔️✔️the attraction between oppositely charged ions
Hydrogen bonds - ✔️✔️Very weak bonds; occurs when a hydrogen atom in one
molecule is attracted to the electrostatic atom in another molecule
Fact - ✔️✔️A statement that can be proved.
independent variable - ✔️✔️variable that is manipulated
dependent variable - ✔️✔️The outcome factor; the variable that may change in
response to manipulations of the independent variable
experimental bias - ✔️✔️a mistake in the design of an experiment that makes a
particular result more likely
Pseudoscience - ✔️✔️A fake or false science that makes claims based on little or no
scientific evidence.
Matter - ✔️✔️Anything that has mass and takes up space
Mass - ✔️✔️A measure of the amount of matter in an object
Element - ✔️✔️A substance that cannot be broken down into simpler substances
Compounds - ✔️✔️2 or more elements chemically combined in a fixed ratio
Atoms - ✔️✔️smallest unit of matter
Molecule - ✔️✔️two or more atoms held together by covalent bonds
, subatomic particles - ✔️✔️protons, neutrons, electrons
Proton - ✔️✔️Positive charge found in nucleus
Electron - ✔️✔️negatively charged particle found in electron cloud
Neutron - ✔️✔️A small particle in the nucleus of the atom, with no electrical charge
atomic number - ✔️✔️the number of protons in the nucleus of an atom
mass number (atomic mass) - ✔️✔️The sum of protons and neutrons in the nucleus of
an atom
Isotopes - ✔️✔️Atoms with the same number of protons but different numbers of
neutrons
Science - ✔️✔️an approach to understanding the natural world
control group - ✔️✔️Lacks or doesn't receive the factor being teseted
experimental group - ✔️✔️the group in an experiment that receives the variable being
tested
peer review - ✔️✔️evaluation of scientific, academic, or professional work by others
working in the same field.
Theory - ✔️✔️Comprehensive and well substantiated explanation , broader in scope
than hypothesis
Cohesion - ✔️✔️an attraction between molecules of the same substance
Acid - ✔️✔️compound that forms hydrogen ions (H+) in solution
Base - ✔️✔️A substance that decreases the hydrogen ion concentration in a solution.
pH scale - ✔️✔️A range of values used to express the concentration of hydrogen ions
in a solution
Buffers - ✔️✔️substances that minimize changes in pH
organic compounds - ✔️✔️carbon-based molecules
