Shared Flashcard Set

Details

Bio Final
Bio final
78
Science
10th Grade
01/12/2012

Additional Science Flashcards

 


 

Cards

Term
Observation
Definition
Use of the senses to gather
and record information about
structures or processes in the
natural world.
Term
Data
Definition
Recorded observations or
items of information.
Term
Inference
Definition
A logical conclusion based on
observations (data).
Term
Quantitative Data
Definition
Data that consists of recorded
measurements.
Term
Qualitative Data
Definition
Data in the form of descriptions.
Term
Phenomenon
Definition
Any event or object that
appears in the natural world
and is of scientific significance
or interest.
Term
Generalization
Definition
A general conclusion
supported by a large number
of observations or other data.
Term
Hypothesis
Definition
A suggested, testable answer
to a welldefined
scientific
question.
Term
Prediction
Definition
A proposed outcome based
on a given hypothesis.
Term
Experiment
Definition
A procedure designed to test
the validity of a given
hypothesis.
Term
Variable
Definition
A factor or condition which
could affect the results of an
experiment.
Term
Experimental Group
Definition
A set or group in an
experiment which has or is
given the condition the
experiment is designed to test.
Term
Control Group
Definition
A set or group in an experiment
which has or is given the
contrasting condition to the one
the experiment is designed to
test.
Term
Controlled Experiment
Definition
An experiment that limits the
effects of variables so that only
one variable is being tested.
Term
Matter
Definition
Anything that takes up space and has mass.
Term
Element
Definition
A pure substance that can not be broken down into other substances by chemical means.
Term
Trace Element
Definition
Any element that makes up less than 0.01% of the mass of a living organism but is critical to the health of the organism.
Term
Compound
Definition
A substance containing two or more different elements that are chemically combined together.
Term
Atom
Definition
The simplest particle of an element that retains all the properties of that element.
Term
Proton
Definition
A subatomic particle with a single unit of positive electric charge (+).
Term
Electron
Definition
A subatomic particle with a single unit of negative electric charge (-).
Term
Neutron
Definition
A subatomic particle that has no charge (is electrically neutral).
Term
Nucleus
Definition
The central core of an atom that containsprotons and neutrons .
Term
Atomic Number
Definition
The number of protons in an atom's nucleus.
Term
Isotope
Definition
One of several forms of an element, each containing the same number of protons in their atoms but a different number of neutrons.
Term
Radioactive Isotope(Radio-isotope)
Definition
An isotope in which the nucleus decays (breaks down) over time, giving off radiation in the form of matter and energy.
Term
Molecule
Definition
Two or more atoms held together by covalent bonds.
Term
Ion
Definition
An atom or group of atoms that has become electrically charged as a result of gaining or losing an electron(s).
Term
Ionic Bond
Definition
A chemical bond that occurs when an atom transfers an electron to another atom.
Term
Covalent Bond
Definition
A chemical bond that forms when two atoms share electrons.
Term
Chemical Reaction
Definition
Breaking of old and formation of new chemical bonds that result in new substances.
Term
Reactant
Definition
A compound or atom that is involved in a chemical reaction.
Term
Product
Definition
New material created as a result of a chemical reaction.
Term
Synthesis Reaction
Definition
A chemical reaction in which two different elements are bonded together forming a compound.

A + B AB
Term
Decomposition Reaction
Definition
A chemical reaction in which a compound is broken down into its elements.
Term
Single Displacement Reaction
Definition
A chemical reaction between an element and a compound which yields a different element and compound.
Term
Double Displacement Reaction
Definition
A chemical reaction between two compounds that yields two different compounds.
Term
Polar Molecule
Definition
A molecule in which opposite
ends have opposite electric
charges .
Term
Hydrogen Bond
Definition
A bond created by the weak attraction of a slightly positive hydrogen atom to a slightly negative portion of another molecule.
Term
Cohesion
Definition
A tendency of molecules of the same kind to stick to one another.
Term
Adhesion
Definition
An attraction between unlike molecules.
Term
Solution
Definition
A uniform mixture of two or more substances.
Term
Solvent
Definition
The part of a solution that dissolves the other substance and is present in the greater amount .
Term
Solute
Definition
The part of a solution that is dissolved and is present in a lesser amount .
Term
Aqueous Solution
Definition
A solution in which water is the solvent.
Term
Acid
Definition
A compound that donates H+ ions to an aqueous solution and measures less than 7 on the pH scale.
Term
Base
Definition
A compound that removes H+ ions from an aqueous solution and that measures more than 7 on the pH scale.
Term
Buffer
Definition
A substance that maintains a fairly constant pH in a solution by accepting H+ ions when their levels rise and donating H+ ions when their levels fall.
Term
Organic Molecule
Definition
A molecule built upon a framework of carbon atoms.
Term
Inorganic Molecule
Definition
A non-carbon based molecule.
Term
Hydrocarbon
Definition
A class of organic molecule composed of only carbon and hydrogen atoms.
Term
Functional Group
Definition
A group of atoms within a molecule that interacts in predictable ways.
Term
Hydrophilic
Definition
(Water Loving) A molecule that is attracted to water molecules.
Term
Hydrophobic
Definition
(Water Fearing) A molecule that repelled by water molecules.
Term
Monomer
Definition
A small molecular unit that is the building block of a larger molecule.
Term
Polymer
Definition
A molecule consisting of a long chain of smaller molecular units (monomers).
Term
Carbohydrate
Definition
A class of organic compounds based on sugar molecules.
Term
Monosaccharide
Definition
A monomer composed of a single sugar molecule.
Term
Disaccharide
Definition
A sugar composed of two monosaccharides.
Term
Polysaccharide
Definition
A long polymer chain made up of simple sugar monomers.
Term
Starch
Definition
A polysaccharide in plant cells that consists entirely of glucose monomers.
Term
Glycogen
Definition
A polysaccharide in animal cells that consists of many glucose monomers.
Term
Cellulose
Definition
A polysaccharide consisting of glucose monomers that reinforces plant-cell walls.
Term
Lipid
Definition
One of a class of water-avoiding (hydrophobic) compounds.
Term
Fat
Definition
An organic compound consisting of a three-carbon backbone (glycerol) attached to three fatty acids.
Term
Saturated Fat
Definition
A fat in which all three fatty acid chains contain no double bonds and hold the maximum possible number of hydrogen atoms.
Term
Steroid
Definition
A lipid molecule with four fused carbon rings.
Term
Cholesterol
Definition
A steroid molecule present in the plasma membranes of animal cells.
Term
Nucleic Acid
Definition
A class of organic compounds that stores and carries important information used for cell function.
Term
Nucleotide
Definition
A building block monomer of nucleic acid polymers.
Term
Nitrogenous Base
Definition
A nucleotide composed of a single or double ring of carbon and nitrogen atoms with attached functional groups.
Term
Pentose
Definition
A 5-carbon sugar based on a ring-shaped framework.
Term
Ribose
Definition
The pentose found in the bases that make up RNA.
Term
Deoxyribose
Definition
The pentose found in the bases that make up DNA.
Term
Pyrimidines
Definition
Family of nitrogenous based on a single ring of carbon and nitrogen atoms.
Term
Purines
Definition
Family of nitrogenous based on a double ring of carbon and nitrogen atoms.
Term
Double Helix
Definition
Term that describes the structure of DNA which consists of two strands of nucleotides wound about each other.
Term
Complementary Base Pairs
Definition
Nucleotide bases that must pair with each other in nucleic acids.
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