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Biology Test 1- Loui

What is Biology? Scientific study of life. Lays the foundation for asking basic questions about life and the natural world.
List the organization of life Cell, multi celled, population, community, ecosystem, biosphere
What is an atom? Fundamental units of all substances, living and nonliving.
What is a Molecule? Atoms joined into chemical bonds
What is an example of a molecule? Water Molecule
What is a cell? Smallest unit of life
What is tissue? Organized array of cells and substances that interact in a collective task.
What is an Organ? Structural unit of interacting tissue
What is an Organ System? Set of interacting organs
What is Multicelled Organisms? an individual that consists of one or more cells
What is a Population? Group of single celled or multi celled individuals of a species in a given area.
What is a Community? All populations of all species in a specified area
What is Ecosystem? Community interacting with its physical environment through the transfer of energy and materials.
What is Biosphere? Region of earths water, crust and atmosphere in which organisms live.
What is Energy? Capacity to do work
What is Work? actively involving mental and physical effort done in order to achieve a purpose or result.
What is metabolism? Reaction by which cells acquire and use energy to grow, survive, and reproduce.
What is the Importance of Organisms? Producers, Consumers, and Decomposers
What is one thing organisms do? Pass down their genes
What do Producers do? Make their own food. Use energy of simple raw materials from the environment.
What do Consumers do? Depend on energy stored in the tissue or producer. The waste of remains of other groups.
What do Decomposers do? Break down remains and wastes. Break organic material into inorganic subunits.
What is Homeostasis? Set of processes which an organism keeps its internal conditions within tolerance.
CHNOPS Carbon, Hydrogen, Oxygen, Phosphorus, Sulfer
What is DNA (Deoxyribonucleic Acid)? Nuclear acid that consists of 2 chains of nucleotides twisted into a double helix. Also carries hereditary information.
What is a Proton? (+) Positively charged subatomic particle that occurs in the nucleus of all atoms.
What is a Neutron? Uncharged subatomic particle in the atomic nucleus.
What is an Electron? (-) Negatively charged subatomic particle that occupies orbitals around an atomic nucleus.
Compound VS. Molecules Atoms bond to form molecules. Molecules can only contain atoms of only ONE element (O2) Molecules of compound contain MORE than one element (H2O)
What are the types of bonding? Ionic, Covalent, Nonpolar Covalent, and Polar Covalent
What is Ionic bonding? one atom loses an electron and becomes a (+) charged ion. Another atom will gain the electron and become a (-) charged ion. Because of the different charges the 2 ions will attract to each other.
What is a Covalent Bond? When atoms share a pair or pairs of electrons to fill the outermost shell. (single, double and triple). 2 hydrogen atoms with one proton, share 2 elections in a single non polar covalent bond.
What is a Nonpolar Covalent Bond? Atoms share elections equally, the nuclei of atoms have the same number of protons. EX- Hydrogen Gas (H-H)
What is a Polar Covalent Bond? Number of protons in the nuclei of participating atoms that is NOT equal.
What is Hydrogen Bonding? Molecule held together by polar covalent bonds that has no net charge. Atoms of the molecules carry different charges. Atom in one polar covalent molecule can be attracted to oppositely charged atoms in another such molecule.
What is Hydrophilic? Polar, Hydrogen bonds with water.
What are some examples of Hydrophilic? Sugar, Salt, ions, electrolytes
What is Hydrophobic? Nonpolar, Repelled by water
What are some examples of Hydrophobic? Oil, fat, gas, grease, gasoline
What is H^2O? Water. It has a polar covalent molecule. No net charge. Oxygen end has a (-) charge, Hydrogen end has a (+) charge
What is pH? Acidity or alkalinty 7= Neutal > than 7, it is alkalinty < than 7, it is acidity
What are Prokaryotes? Member of one of the two single-celled lineages (bacteria & archea) that do not have a nucleus.
What are Eukaryotes? Organisms that consists of one or more cells that have a nucleus.
What is Atomic Number? Number of protons. Ex. Hydrogen-1, Carbon-6
What is Atomic Mass? Number of protons plus the number of Neutrons. Isotopes vary in Mass number
Formation of NaCL Electrons transfer
What is an Isotope? Form of an element that differ in the number of neutrons
What is Buffers? Minimize shift in pH Partnership between weak acid and bas in form when dissolved.
What is Gluclose? Sugar- (C6H12O6)
What is an Hypothesis? Educated scientific guess
_____ are fundamental building blocks of all matter. Atoms
Smallest unit of life is a ____. Cell
All organisms require ____ and _____ to sustain themselves. Nutrients and energy
_______ is a process that maintains conditions in the internal environment within ranges that cells can tolerate. Homeostasis
DNA_____? Guides development of functions, transmitted from parents to offspring, is the basics of traits.
Process where an organism produces offspring? Reproduction
______ move around for part of their life. Animals
A butterfly is? Organism, animal, eukaryotes, consumers
Bacteria is? Organism, single celled
Long standing hypothesis used to make predictions about phenomena is? Theory
Science addresses only that when is? Observable
Control group is... Standard against which experimental group is compared.
Statement by which hypothesis lead you to expect? Predictions
Type of orgnaism? Species
Higher organization level? Emergent
Time-tested hypothesis? Scientific Theory
Testable explanation? Hypothesis
T/F Every atom has an equal number of protons and elections? False
In the periodic table, symbols for elements are arranged by? Atomic numbers
Measure of Chance? Probability
_____ is a molecule into which a radioisotope has been incorporated. Tracer
Measure of an atom ability to pull electrons away from another atom? Electronegativity
Mutual attraction of opposite charge holds atoms together as molecules in an ______ bond. Ionic
Atoms share electrons unequally in a ____ ______ bond. Polar Covalent
Nonpolar to most polar nonpolar polar ionic
_____ repels water hydrophobic
Salt release ions other than _______ in water. H+ or OH-
_____ is dissolved in a solvent. Solute
Hydrogen ions (H+) are.... Unbounded protons, indicated by pH scale, and in blood
Dissolved in water, _____ donated H+; ____ accepts H+ Acid and Base
_____ is chemical partnership between weak acid or base and its salt. Buffer
Atom that has one proton, no neutrons, and no electrons? Hydrogen Ion
Protons > electrons Positive Charge
Number of protons in nucleus Atomic number
Polar; easily dissolved in water hydrophilic
Collectively strong Hydrogen bond
Protons< electrons Negatively Charged
Protons=electrons uncharged
Measure of molecule motion Temperature
Number of protons and neutrons in atomic number mass number
Created by: marygardner