Physics
Matter, motion, forces, energy, electricity, waves, and the physical laws of nature.
83 words
Download MarkdownSome words in this topic are A2–C2 — part of Pro. A1 words are always free.
Go ProA1 (1)
A2 (12) Pro
matter
A2
/ˈmæt.ɚ/
A situation, subject, or affair that is being dealt with or considered.
M
S
power
A2
/ˈpaʊɚ/
The ability to control or influence people and events.
M
S
force
A2
/foɹs/
Physical power or strength used on something.
M
S
energy
A2
/ˈɛn.əɹ.d͡ʒi/
The strength and ability to be active without getting tired.
M
S
pressure
A2
/ˈprɛʃɚ/
A feeling of stress caused by demands or difficulties.
M
S
speed
A2
/spiːd/
How fast something moves or happens.
M
S
heat
A2
/ˈhiːt/
The quality of being hot; high temperature.
M
S
weight
A2
/weɪt/
How heavy something or someone is.
M
S
physical
A2
/ˈfɪzɪkəl/
Relating to the body rather than the mind.
M
S
wave
A2
/weɪv/
To move your hand from side to side to greet someone or say goodbye.
M
S
temperature
A2
/ˈtɛm.pəɹˌt͡ʃɚ/
A measure of how hot or cold something is.
M
S
electric
A2
/ɪˈlɛktɹɪk/
Using, producing, or powered by electricity.
M
S
B1 (13) Pro
mass
B1
/mæs/
A large amount or quantity of something with no clear shape.
M
S
current
B1
/ˈkɝənt/
Happening or existing now; belonging to the present time.
M
S
nuclear
B1
/ˈn(j)u.kli.ɚ/
Using the energy released when atoms are split or joined.
M
S
electricity
B1
/ɪˌlɛkˈtɹɪsɪti/
The energy carried by the flow of electric charge, used to power lights, machines, and devices.
M
S
radiation
B1
/ˌɹæɪ.diˈæɪ.ʃən/
Energy that travels as rays, waves, or particles, such as heat or light.
M
S
tension
B1
/ˈtɛnʃən/
A feeling of worry, nervousness, or unease, often in difficult situations.
M
S
physics
B1
/ˈfɪz.ɪks/
The science that studies matter, energy, and how they affect each other.
M
S
volume
B1
/ˈvɑ.ljum/
How loud a sound is.
M
S
frequency
B1
/ˈfɹiːkwənsi/
How often something happens within a period of time.
M
S
mechanical
B1
/məˈkænəkəl/
Operated by or relating to machines or tools.
M
S
reflection
B1
/ɹɪˈflɛkʃən/
An image seen in a mirror or shiny surface.
M
S
voltage
B1
/ˈvoʊltɪd͡ʒ/
the electric potential difference between two points, equal to energy transferred per unit electric charge and measured in volts
M
S
electron
B1
/ɪˈlɛk.tɹɑn/
A tiny particle inside an atom that carries a negative electric charge.
M
S
B2 (13) Pro
motion
B2
/ˈmoʊ.ʃən/
The act or process of moving; movement.
M
S
resistance
B2
/ɹɪˈzɪstəns/
The act of fighting against or refusing to accept something.
M
S
laser
B2
/ˈleɪzɚ/
A device that produces a narrow, powerful beam of light.
M
S
circuit
B2
/ˈsɝ.kɪt/
A complete path that an electric current flows around.
M
S
fluid
B2
/ˈfluɪd/
A liquid; a substance that flows.
M
S
conductor
B2
/kənˈdʌktɚ/
The person who leads an orchestra or other musical group.
M
S
particle
B2
/ˈpɑɹtɪkəl/
A very small piece of something.
M
S
friction
B2
/ˈfɹɪkʃən̩/
The rubbing of one object or surface against another.
M
S
vibration
B2
/vaɪˈbɹeɪʃən/
A continuous shaking movement, or the act of shaking quickly back and forth.
M
S
relativity
B2
/ɹɛl.əˈtɪv.ɪ.ti/
(physics) The scientific theory that space and time are not fixed but depend on the observer's motion.
M
S
compression
B2
/kəmˈpɹeʃ.ən/
the act of pressing or squeezing something into a smaller space
M
S
wavelength
B2
/ˈweɪvˌlɛŋ(k)θ/
a shared orientation leading to mutual understanding
M
S
transistor
B2
/tɹænˈzɪs.tɚ/
A small electronic part used in devices to control or boost electrical signals.
M
S
C1 (17) Pro
gravity
C1
/ˈɡɹævəti/
The natural force that pulls objects toward the earth or toward each other.
M
S
vacuum
C1
/ˈvæ.kjuːm/
A space that contains no matter or air.
M
S
magnetic
C1
/mæɡˈnɛt.ɪk/
Having the properties of a magnet, or able to attract metal such as iron.
M
S
interference
C1
/ˌɪntəɹˈfɪɹɪns/
The act of getting involved in something that does not concern you.
M
S
fusion
C1
/ˈfjuːʒən/
The act of joining separate things into one, or the result of doing so.
M
S
momentum
C1
/ˌmoʊˈmɛntəm/
The driving force that keeps an idea, process, or campaign moving forward.
M
S
thermal
C1
/ˈθɝməl/
relating to heat, temperature, or the transfer of heat
M
S
spectrum
C1
/ˈspɛktrəm/
A wide range of related ideas, opinions, qualities, or things.
M
S
rotation
C1
/ɹoʊˈteɪʃən/
The act of turning around a central point or axis.
M
S
density
C1
/ˈdɛn.sə.ti/
How much of something there is in a given space or area.
M
S
magnetism
C1
/ˈmægnəˌtɪzəm/
The physical force by which magnets attract or repel iron and other materials.
M
S
torque
C1
/tɔɹk/
a twisting force
M
S
radioactivity
C1
/ˌreɪdɪəʊakˈtɪvɪti/
Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
M
S
optics
C1
/ˈɑptɪks/
the branch of physics concerned with light, vision, and the behavior of electromagnetic radiation
M
S
inertia
C1
/ɪnˈɝ.ʃə/
a disposition to remain inactive or inert
M
S
capacitor
C1
/kəˈpæ.sə.tɚ/
an electrical component that stores energy in an electric field between separated conductors
M
S
convection
C1
/kənˈvɛkʃən/
the transfer of heat through the movement of a liquid or gas
M
S
C2 (11) Pro
radioactive
C2
/ˌɹeɪdioʊˈæktɪv/
exhibiting or caused by radioactivity
M
S
gravitational
C2
/ˌɡɹævɪˈteɪʃənəl/
Relating to or caused by gravity.
M
S
equilibrium
C2
/ˌiːkwəˈlɪbriːəm/
A state of balance in which opposing forces or influences cancel each other out.
M
S
photon
C2
/ˈfəʊtɒn/
The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.
M
S
kinetic
C2
/kɪˈnɛtɪk/
Relating to or produced by movement.
M
S
angular
C2
/ˈæŋ.ɡjə.lɚ/
Having sharp corners or pointed shapes rather than smooth, rounded ones.
M
S
buoyancy
C2
/ˈbɔɪənsi/
irrepressible liveliness and good spirit
M
S
elasticity
C2
/ɪ.læsˈtɪs.ɪ.ti/
The ability of a material to return to its original shape after being stretched or squeezed.
M
S
thermodynamics
C2
/ˌθɜː(ɹ)moʊdaɪˈnæmɪks/
The science of the conversions between heat and other forms of energy.
M
S
electromagnetism
C2
/ɪˌlɛk.tɹoʊˈmæɡ.nəˌtɪzm̩/
magnetism produced by an electric current
M
S
diffraction
C2
/dɪˈfɹækʃən/
when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
M
S
C2+ (16) Pro
amplitude
C2+
/ˈæmplɪtuːd/
the extent or magnitude of something; the range of a wave
M
S
vector
C2+
/ˈvɛktər/
a quantity with magnitude and direction; a carrier of disease
M
S
velocity
C2+
/vəˈlɑsəti/
speed in a given direction; rapidity of motion
M
S
acceleration
C2+
/ækˌsɛləˈreɪʃən/
the rate of increase of speed or, more generally, the act of speeding up
M
S
dispersion
C2+
/dɪˈspɜrʒən/
the act of scattering or the state of being spread over a wide area
M
S
entropy
C2+
/ˈɛntrəpi/
a measure of disorder or of energy unavailable for work in a system
M
S
conduction
C2+
/kənˈdʌkʃən/
the transmission of heat, electricity, or signals through a medium
M
S
displacement
C2+
/dɪsˈpleɪsmənt/
the act of moving something from its place or the resulting shift
M
S
fission
C2+
/ˈfɪʃən/
the splitting of an atomic nucleus or a cell into parts
M
S
magnet
C2+
/ˈmæɡnɪt/
an object that attracts iron; a person or thing that draws others
M
S
oscillation
C2+
/ˌɑsɪˈleɪʃən/
a regular movement back and forth between two points or states
M
S
physicist
C2+
/ˈfɪzɪsɪst/
a scientist who specializes in the study of physics
M
S
quantum
C2+
/ˈkwɑntəm/
a discrete quantity of energy, or the smallest possible amount
M
S
refraction
C2+
/rɪˈfrækʃən/
the bending of light or other waves as they pass between media
M
S
resonance
C2+
/ˈrɛzənəns/
the quality of being deep, full, and reverberating; sympathetic vibration
M
S
viscosity
C2+
/vɪˈskɑsɪti/
a fluid's resistance to flow; thickness or stickiness
M
S
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