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Glossary
808 key concepts defined with examples and study links.
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Math
Science
Social Studies
English
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E
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K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
A
Aa similarity
Math
Ability expressions
Foreign Languages
Absolute value
Math
Absolute value equations
Math
Acceleration
Science
Accumulation functions
Math
Accusative case
Foreign Languages
Acid rain
Science
Acid-base theory
Science
Act vocabulary
English
Activation energy
Science
Active listening
English
Adaptation
Science
Addition equations
Math
Adjective agreement
Foreign Languages
Adjectives
Foreign Languages
Age of exploration
Social Studies
Agriculture
Science
Air pressure
Science
Ambiguous case
Math
Amendments
Social Studies
American revolution
Social Studies
Amplitude and period
Math
Amplitude period and phase shift
Math
Amplitude period phase shift
Math
Analogies
English
Angle bisectors and medians
Math
Angle pairs
Math
Angles of elevation and depression
Math
Angular momentum
Science
Angular velocity
Science
Animals
Foreign Languages
Antarctica
Social Studies
Antiderivatives
Math
Antonym pairs
English
Arc length
Math
Arc length and sector area
Math
Arcsin arccos arctan
Math
Area between curves
Math
Area of polygons
Math
Arithmetic sequences
Math
Art and architecture
Foreign Languages
Articles of confederation
Social Studies
Asymptotes
Math
Atmosphere
English
Atmosphere layers
Science
Atmospheric layers
Science
Atomic models
Science
Atp cycle
Science
Australia and new zealand
Social Studies
Authentic voice
English
Author's purpose
English
Avoiding plagiarism
English
Avoir mal à
Foreign Languages
B
Bacteria and viruses
Science
Balancing equations
Science
Bar graphs
Math
Basic definitions
Math
Basic greetings
Foreign Languages
Basic probability
Math
Basic rules
Math
Beauty ideals
Foreign Languages
Bias
Math
Bias detection
English
Bill of rights
Social Studies
Binomial distribution
Math
Binomial nomenclature
Science
Binomial probability
Math
Biochemistry
Science
Biodiversity
Science
Biogeochemical cycles
Science
Biomes
Science
Body parts
Foreign Languages
Boyle's law
Science
Budgeting
Social Studies
Buffers
Science
Buying tickets
Foreign Languages
C
Cabinet departments
Social Studies
Campaign finance
Social Studies
Carrying capacity
Science
Catalysts
Science
Causes of civil war
Social Studies
Cell cycle
Science
Cell membrane
Science
Cell organelles
Science
Cell respiration
Science
Cell transport
Science
Central america and caribbean
Social Studies
Central and inscribed angles
Math
Central limit theorem
Math
Centripetal force
Science
Chain rule
Math
Character analysis
English
Character growth
English
Character types
English
Characteristics of life
Science
Characterization
English
Charles's law
Science
Checks and balances
Social Studies
Chemical weathering
Science
Chinese cuisine
Foreign Languages
Circles and circumference
Math
Circuits
Science
Circulatory system
Science
Citation
English
City vocabulary
Foreign Languages
Civil rights movement
Social Studies
Civil rights movements
Social Studies
Civil war battles
Social Studies
Climate change
Science
Climate zones
Science
Clothing vocabulary
Foreign Languages
Cold war
Social Studies
Colligative properties
Science
Collisions
Science
Colonial economies
Social Studies
Colonial settlements
Social Studies
Colors and sizes
Foreign Languages
Columbian exchange
Social Studies
Combining like terms
Math
Common greek roots
English
Common latin roots
English
Common prefixes
English
Common suffixes
English
Community customs
Foreign Languages
Community ecology
Science
Comparative advantage
Social Studies
Comparing fractions
Math
Comparison expressions
Foreign Languages
Compartmentalization
Science
Completing the square
Math
Complex numbers
Math
Complex numbers in polar form
Math
Composition of functions
Math
Compositions of inverse trig
Math
Compound inequalities
Math
Concentration
Science
Conditional statements
Math
Conditional tense
Foreign Languages
Conditionnel présent
Foreign Languages
Confidence interval for slope
Math
Confidence intervals for proportions
Math
Conflict types
English
Congress
Social Studies
Congress structure
Social Studies
Congressional powers
Social Studies
Connotation
English
Connotation and denotation
English
Conservation of energy
Science
Conservation of mass
Science
Conservation of momentum
Science
Constitution
Social Studies
Constitutional design
Social Studies
Constitutional principles
Social Studies
Context clue types
English
Context clues
English
Continuity
Math
Correlation
Math
Coterminal angles
Math
Counterarguments
English
Court system
Social Studies
Courts
Social Studies
Covalent bonds
Science
Cpctc
Math
Credit and debt
Social Studies
Cross-curricular terms
English
Cultural customs
Foreign Languages
Cultural diffusion
Social Studies
Cultural diversity
Social Studies
Cultural traditions
Foreign Languages
D
Daily activities
Foreign Languages
Daily routine expressions
Foreign Languages
Daily schedule
Foreign Languages
Dar al-islam
Social Studies
Days and months
Foreign Languages
Decimal conversions
Math
Decolonization
Social Studies
Degree to radian conversion
Math
Demand curves
Social Studies
Democratic ideals
Social Studies
Demographic transition
Science
Demonstrative adjectives
Foreign Languages
Denotation vs connotation
English
Derivative definition
Math
Describing people
Foreign Languages
Descriptive language
English
Determinants
Math
Dialogue formatting
English
Difference of squares
Math
Digestive system
Science
Digital age
Social Studies
Digital literacy
English
Dipole-dipole
Science
Directions
Foreign Languages
Discounts and tax
Math
Discriminant
Math
Displacement and velocity
Science
Distributive property
Math
Division equations
Math
Dna replication
Science
Dna structure
Science
Doler and sentirse
Foreign Languages
Domain and range
Math
Domain-specific terms
English
Domains and kingdoms
Science
Dominant and recessive traits
Science
Doppler effect
Science
Dot product
Math
Double-angle formulas
Math
Dramatic conventions
English
Dramatic structure
English
Due process
Social Studies
E
Earth-moon system
Science
Earthquake waves
Science
East asia
Social Studies
Economic development
Foreign Languages
Economic systems
Social Studies
Economics terms
English
Ecosystem services
Science
Ecosystems
Science
Education systems
Foreign Languages
Elastic and inelastic collisions
Science
Electoral process
Social Studies
Electric charge
Science
Electrolysis
Science
Electromagnetic induction
Science
Electromagnetic spectrum
Science
Electromagnets
Science
Electron configuration
Science
Electronegativity
Science
Element groups
Science
Elimination method
Math
Ellipses
Math
End behavior
Math
Energy conservation
Science
Energy flow
Science
Enlightenment
Social Studies
Enlightenment thinkers
Social Studies
Enthalpy
Science
Entropy
Science
Environmental challenges
Social Studies
Environmental issues
Foreign Languages
Enzyme structure
Science
Equal protection
Social Studies
Equations with variables on both sides
Math
Equilibrium constant
Science
Erosion and deposition
Science
Essay structure
English
Ethical questions
Foreign Languages
Ethos, pathos, logos
English
Ê
Être and avoir
Foreign Languages
E
European exploration
Social Studies
European union
Social Studies
Evaluating expressions
Math
Evaluating inverse trig
Math
Evidence and reasoning
English
Evidence of evolution
Science
Evidence usage
English
Evolution
Science
Exchange rates
Social Studies
Executive agencies
Social Studies
Experiments
Math
Exponent rules
Math
Exponential growth and decay
Math
Exponential models
Math
Extreme values
Math
F
Factoring by grouping
Math
Factoring trinomials
Math
Family members
Foreign Languages
Family structures
Foreign Languages
Federal reserve
Social Studies
Federalism
Social Studies
Feedback mechanisms
Science
Figurative language
English
Fiscal and monetary policy
Social Studies
Fission and fusion
Science
Food vocabulary
Foreign Languages
Food webs
Science
Forestry
Science
Formal and informal greetings
Foreign Languages
Formal register
English
Fossil fuels
Science
Four tones
Foreign Languages
Fraction operations
Math
Francophone countries
Foreign Languages
Free energy and equilibrium
Science
Free-body diagrams
Science
French and indian war
Social Studies
French holidays
Foreign Languages
French revolution
Social Studies
Friction
Science
Function notation
Math
Functions of money
Social Studies
Fundamental theorem
Math
Fundamental theorem of algebra
Math
Futur proche
Foreign Languages
Futur simple
Foreign Languages
Future tense
Foreign Languages
G
Galvanic cells
Science
Gcf factoring
Math
Gdp
Social Studies
Gene regulation
Science
Genocide
Social Studies
Geography terms
Foreign Languages
Geometric distribution
Math
Geometric sequences
Math
German alphabet and umlauts
Foreign Languages
German cuisine
Foreign Languages
Gibbs free energy
Science
Giving directions
Foreign Languages
Global economy
Social Studies
Global warming
Science
Globalization
Social Studies
Goodness of fit
Math
Government spending
Social Studies
Government terms
English
Graphing inequalities
Math
Graphing sine and cosine
Math
Graphing systems
Math
Graphing trig functions
Math
Great depression
Social Studies
Greenhouse effect
Science
Groundwater
Science
Group discussion
English
Gustar verbs
Foreign Languages
H
Haitian revolution
Social Studies
Half-angle formulas
Math
Half-life
Science
Hardy-weinberg
Science
Health expressions
Foreign Languages
Hess's law
Science
High-frequency sat words
English
Histograms and dotplots
Math
History terms
English
Holidays and festivals
Foreign Languages
Hot spots
Science
Human rights
Foreign Languages
Human-environment interaction
Social Studies
Hydrogen bonding
Science
Hyperbolas
Math
Hypothesis tests for proportions
Math
I
Ice ages
Science
Ice tables
Science
Ideal gas law
Science
Identifying conics
Math
Igneous sedimentary metamorphic
Science
Imagery and metaphor
English
Immigration
Social Studies
Immune response
Science
Immune system
Science
Imparfait basics
Foreign Languages
Imperialism
Social Studies
Implicit differentiation
Math
Impulse
Science
Impulse and momentum
Science
Indian ocean trade
Social Studies
Indoor air quality
Science
Inductive reasoning
Math
Industrial revolution
Social Studies
Industrialization
Social Studies
Infectious diseases
Science
Inference
English
Inflation and unemployment
Social Studies
Integer operations
Math
Interest groups
Social Studies
Interest rates
Social Studies
Interference
Science
Introductions
Foreign Languages
Invasive species
Science
Inverse functions
Math
Inverse matrices
Math
Ionic bonds
Science
Ir + a + infinitive
Foreign Languages
Island biogeography
Science
Isosceles triangle theorem
Math
Ivt
Math
J
Jeffersonian democracy
Social Studies
Judicial review
Social Studies
K
Kinematic equations
Science
Kinetic energy
Science
L
L'hopital's rule
Math
Labor movements
Social Studies
Landmark supreme court cases
Social Studies
Latin american revolutions
Social Studies
Lava types
Science
Law of cosines
Math
Law of sines
Math
Lawmaking process
Social Studies
Le chatelier's principle
Science
Least-squares regression
Math
Leisure and sports
Foreign Languages
Lenses and mirrors
Science
Lewis structures
Science
Liberal vs conservative
Social Studies
Limit definition
Math
Limiting reagents
Science
Line of best fit
Math
Linear modeling
Math
Linear programming
Math
Linearization
Math
Literal equations
Math
Literary devices
English
Literature and music
Foreign Languages
Local government structure
Social Studies
Location and place
Social Studies
Location words
Foreign Languages
Logarithm properties
Math
Logarithmic properties
Math
Logical fallacies
English
London dispersion
Science
M
Macromolecules
Science
Magnetic fields
Science
Main idea
English
Main idea and details
English
Manifest destiny
Social Studies
Maritime empires
Social Studies
Market equilibrium
Social Studies
Market revolution
Social Studies
Math terminology
English
Matrix operations
Math
Mean median mode
Math
Mean value theorem
Math
Measure words
Foreign Languages
Measuring angles
Math
Mechanical weathering
Science
Media
Social Studies
Media messages
English
Meiosis
Science
Membrane transport
Science
Mendelian genetics
Science
Metals nonmetals metalloids
Science
Mexico
Social Studies
Middle east
Social Studies
Midsegments
Math
Mineral identification
Science
Ming dynasty
Social Studies
Mitosis
Science
Mixed numbers
Math
Mla and apa format
English
Modal verbs
Foreign Languages
Molar ratios
Science
Mole concept
Science
Monopolistic competition
Social Studies
Monopoly
Social Studies
Motion graphs
Science
Motivation and backstory
English
Mountain formation
Science
Movement and regions
Social Studies
Mughal empire
Social Studies
Multi-step equations
Math
Multiculturalism
Foreign Languages
Multiplication equations
Math
Multiplying polynomials
Math
N
Narrative arc
English
Narrative techniques
English
Narrative terms
English
National identity
Foreign Languages
Native american societies
Social Studies
Natural log
Math
Natural selection
Science
Nature vocabulary
Foreign Languages
Neighborhood places
Foreign Languages
Nervous system
Science
Net force
Science
Net ionic equations
Science
Neutralization reactions
Science
Newton's three laws
Science
Non-aligned movement
Social Studies
Non-mendelian genetics
Science
Normal distribution
Math
North africa
Social Studies
Nth roots
Math
Nuclear energy
Science
Nuclear physics
Science
Numbers 1-100
Foreign Languages
Numbers and alphabet
Foreign Languages
O
Observational studies
Math
Ocean acidification
Science
Ocean currents
Science
Ohm's law
Science
Oligopoly
Social Studies
One-sample t-test
Math
Operations with radicals
Math
Opportunity cost
Social Studies
Optimization
Math
Oral presentations
English
Orbital motion
Science
Order of operations
Math
Ordered pairs
Math
Ordering at a café
Foreign Languages
Ordering at a restaurant
Foreign Languages
Ordering food
Foreign Languages
Ordering in a restaurant
Foreign Languages
Oscillation period
Science
Ottoman empire
Social Studies
Outliers
Math
Ozone depletion
Science
P
Pacific islands
Social Studies
Paired t-test
Math
Parabolas
Math
Parallel and perpendicular lines
Math
Parallelogram properties
Math
Parametric equations
Math
Partial fractions
Math
Partitive articles
Foreign Languages
Passé composé with avoir
Foreign Languages
Passé composé with être
Foreign Languages
Peer feedback
English
Pendulums
Science
Percent change
Math
Percent conversions
Math
Percent of a number
Math
Percent yield
Science
Perfect competition
Social Studies
Periodic trends
Science
Permutations and combinations
Math
Personal beliefs
Foreign Languages
Persuasive techniques
English
Ph calculations
Science
Ph scale
Science
Phase diagrams
Science
Phases of matter
Science
Phone numbers and addresses
Foreign Languages
Photosynthesis
Science
Phylogenetic trees
Science
Physical features
Social Studies
Physical geography
Social Studies
Piecewise functions
Math
Pinyin initials and finals
Foreign Languages
Plant structure
Science
Plate boundaries
Science
Plate tectonics
Science
Plot structure
English
Plotting points
Math
Poetic devices
English
Poetic form and structure
English
Poetic forms
English
Poetic terms
English
Point of view
English
Point-slope form
Math
Polar coordinates
Math
Polar graphs
Math
Polite expressions
Foreign Languages
Political parties
Social Studies
Political socialization
Social Studies
Polygon angle sums
Math
Polynomial division
Math
Polynomial operations
Math
Population dynamics
Science
Population ecology
Science
Population growth
Science
Population patterns
Social Studies
Populism
Social Studies
Possessive articles
Foreign Languages
Possessive de
Foreign Languages
Potential energy
Science
Prepositions of location
Foreign Languages
Prepositions of place
Foreign Languages
Prepositions with dative
Foreign Languages
Presidency
Social Studies
Presidential powers
Social Studies
Preterite irregular verbs
Foreign Languages
Preterite regular verbs
Foreign Languages
Preterite vs imperfect
Foreign Languages
Prices and currency
Foreign Languages
Probability rules
Math
Progressivism
Social Studies
Projectile motion
Science
Prokaryotes vs eukaryotes
Science
Proportions in triangles
Math
Proving lines parallel
Math
Public opinion
Social Studies
Public policy
Social Studies
Punctuation
English
Punnett squares
Science
Purposes of government
Social Studies
Pythagorean identities
Math
Pythagorean theorem
Math
Q
Quadrants
Math
Quadratic formula
Math
Quantum basics
Science
R
Radioactive decay
Science
Random variables
Math
Rate laws
Science
Rational exponents
Math
Reaction rates
Science
Reaction types
Science
Reagan era
Social Studies
Real number properties
Math
Reconstruction
Social Studies
Rectangles and squares
Math
Reference angles
Math
Reflection
Science
Reflections
Math
Reflexive verbs
Foreign Languages
Reform movements
Social Studies
Refraction
Science
Regular polygons
Math
Regulation
Social Studies
Related rates
Math
Renewables
Science
Replication
Science
Reproduction in plants
Science
Resonance
Science
Resources and development
Social Studies
Restoring force
Science
Revision strategies
English
Rhetorical devices
English
Rhetorical strategies
English
Rhythm and sound
English
Riemann sums
Math
Rock cycle
Science
Rooms and furniture
Foreign Languages
Root word families
English
Rotational inertia
Science
S
Sampling distribution of a mean
Math
Sampling distribution of a proportion
Math
Sampling methods
Math
Saving and investing
Social Studies
Scarcity and choice
Social Studies
Scatter plots
Math
Scatterplots
Math
School subjects
Foreign Languages
Science terminology
English
Scientific innovations
Foreign Languages
Scientific method
Science
Seasons
Foreign Languages
Secants and chords
Math
Segments and rays
Math
Seismology
Science
Selective incorporation
Social Studies
Self-editing
English
Self-introduction
Foreign Languages
Sensory details
English
Sentence structure
English
Separable verbs
Foreign Languages
Separation of variables
Math
Ser vs estar
Foreign Languages
Series and parallel
Science
Shades of meaning
English
Shakespeare basics
English
Shopping dialogues
Foreign Languages
Sigma notation
Math
Signal transduction
Science
Silk roads
Social Studies
Similar polygons
Math
Simplifying radicals
Math
Simplifying rational expressions
Math
Sine and cosine graphs
Math
Sine cosine tangent
Math
Slavery origins
Social Studies
Slope
Math
Slope fields
Math
Slope inference
Math
Slope-intercept form
Math
Slopes of parallel and perpendicular lines
Math
Smog
Science
Social networks
Foreign Languages
Soh-cah-toa
Math
Soil composition
Science
Soil contamination
Science
Solar system
Science
Solid waste
Science
Solubility
Science
Solving by factoring
Math
Solving exponential equations
Math
Solving inequalities
Math
Solving log equations
Math
Solving proportions
Math
Solving radical equations
Math
Solving rational equations
Math
Solving right triangles
Math
Solving systems with matrices
Math
Song dynasty
Social Studies
Sound
Science
Sound waves
Science
Source evaluation
English
Source integration
English
South america
Social Studies
South and southeast asia
Social Studies
Spanish-speaking countries
Foreign Languages
Special quadrilaterals
Math
Special relativity
Science
Special right triangles
Math
Speciation
Science
Species diversity
Science
Speed and velocity
Science
Sports and activities
Foreign Languages
Sports and hobbies
Foreign Languages
Springs
Science
Squeeze theorem
Math
Staging and dialogue
English
Standard deviation
Math
Standard form
Math
Standing waves
Science
Stars and galaxies
Science
State constitutions
Social Studies
Stem-and-leaf plots
Math
Stoichiometry
Science
Storms
Science
Strong vs weak acids
Science
Sub-saharan africa
Social Studies
Subatomic particles
Science
Subject-verb agreement
English
Substitution method
Math
Subtext
English
Subtraction equations
Math
Sum and difference formulas
Math
Supply curves
Social Studies
Surface area
Math
Synonym pairs
English
Synthesizing multiple perspectives
English
Systems of three variables
Math
T
T-intervals
Math
T-test for slope
Math
Tangent graphs
Math
Tangent lines
Math
Taxation
Social Studies
Technical language
English
Technology in daily life
Foreign Languages
Technology revolution
Social Studies
Tectonic plates
Science
Telling time
Foreign Languages
Test for homogeneity
Math
Test for independence
Math
Test-taking strategies
English
Text structure
English
Textual evidence
English
Theme and symbolism
English
Theme development
English
Thesis development
English
Thesis statements
English
Tides
Science
Tier 2 words
English
Time expressions
Foreign Languages
Titrations
Science
Tone analysis
English
Tone and mood
English
Tone pairs
Foreign Languages
Torque
Science
Total war
Social Studies
Toxicology
Science
Trade barriers
Social Studies
Tragedy and comedy
English
Trans-saharan trade
Social Studies
Transcription
Science
Transcription and translation
Science
Transformations
Math
Translation
Science
Transportation modes
Foreign Languages
Travel and tourism
Foreign Languages
Travel vocabulary
Foreign Languages
Triangle congruence postulates
Math
Triangle inequality
Math
Triangles
Math
Trig values of any angle
Math
Two-column proofs
Math
Two-party system
Social Studies
Two-proportion z-test
Math
Two-sample t-test
Math
Types of government
Social Studies
U
U.s. and canada
Social Studies
Unit circle
Math
Unit circle values
Math
Unit rates
Math
Universal gravitation
Science
Unknown word analysis
English
Urbanization
Science
V
Variables and expressions
Math
Vector operations
Math
Verifying identities
Math
Vertex form
Math
Vietnam war
Social Studies
Vocabulary in context
English
Vocabulary strategies
English
Volcanic eruptions
Science
Volume of prisms and cylinders
Math
Volume of pyramids and cones
Math
Volumes of revolution
Math
Voting and elections
Social Studies
Vsepr
Science
W
War on terror
Social Studies
Water cycle
Science
Water management
Science
Water pollution
Science
Water properties
Science
Wave properties
Science
Weather expressions
Foreign Languages
Weather patterns
Science
Weekend plans
Foreign Languages
Western and eastern europe
Social Studies
Word building
English
Word choice
English
Word origins
English
Word parts strategy
English
Work
Science
Work-energy theorem
Science
World war i
Social Studies
World war ii
Social Studies
World-building techniques
English
Writing from graphs
Math
Writing inequalities
Math
Writing ratios
Math
Wwi
Social Studies
Wwii
Social Studies
X
X and y intercepts
Math
Z
Zeros and end behavior
Math
Zeros and multiplicity
Math