Subject

Energy vocabulary for science class

This list is for students studying energy in science class, including heat transfer, energy types, and renewable power sources. Use it to preview a physics or Earth science unit, or review terms before a test on how energy moves and changes form.

Practice these words ↗Take a quiz

Energy vocabulary for science class

Word	Meaning	In a sentence
energynoun	The capacity to do work or bring about change.	Sunlight provides energy that the plant uses to make sugars.
kinetic energynoun	The energy an object possesses because it is moving.	A speeding car has far more kinetic energy than the same car parked at rest.
potential energynoun	Stored energy that an object has because of its position, height, or condition, ready to be released.	A ball held above the ground has potential energy due to gravity.
thermal energynoun	The energy a substance has because of the motion of its particles, commonly experienced as heat.	The engine converts thermal energy from burning fuel into motion that turns the wheels.
heatnoun	The quality of being hot; thermal energy that can be felt or measured as temperature.	The heat from the oven made the whole kitchen uncomfortably warm.
conductionnoun	The transfer of heat or electricity through a substance without any movement of the substance itself.	Metal spoons heat up quickly by conduction when left in a hot pan.
convectionnoun	The transfer of heat through the movement of a liquid or gas, such as air or water.	Convection currents inside the oven help the hot air cook food evenly.
radiationnoun	Energy that travels outward from a source as waves or particles, including light, heat, and nuclear emissions.	The sun's radiation warms the earth and drives most of its weather.
renewableadjective	Able to be replaced naturally or continue indefinitely, or capable of being extended or renewed.	Solar and wind are renewable sources of energy that will not run out.
nonrenewableadjective	Not able to be replaced once used up, especially describing a natural resource.	Oil and coal are nonrenewable resources that took millions of years to form.
solar energynoun	Energy produced from the sun's radiation, often captured and converted using panels or mirrors.	The house runs entirely on solar energy collected by panels on the roof.
wind energynoun	Power generated by converting the movement of wind into electricity, typically using turbines.	The coastal town now gets most of its electricity from wind energy produced by offshore turbines.
hydropowernoun	Electrical power generated from the energy of moving or falling water.	The country invested heavily in hydropower to reduce its reliance on coal.
geothermaladjective	Relating to the heat generated and stored within the Earth.	The small country generates most of its electricity from geothermal energy plants.
fossil fuelnoun	A natural fuel such as coal, oil, or gas formed from the remains of ancient organisms.	Many countries are trying to reduce their reliance on fossil fuels for electricity.
combustionnoun	The chemical process of burning, in which a substance reacts with oxygen to release heat and light.	The engine relies on the combustion of fuel to generate power.
insulationnoun	Material used to prevent heat, sound, or electricity from passing through, or the process of adding such material.	Thick insulation in the attic keeps the house warm during winter.
conductornoun	A person who directs a musical group, especially an orchestra or choir, through gestures.	The conductor raised her baton, and the orchestra fell silent in anticipation.
joulenoun	The SI unit of energy or work, equal to the force of one newton acting over one meter.	The physics problem asked students to calculate energy in joules, not calories.
wattnoun	The standard unit of electrical or mechanical power, equal to one joule of energy per second.	The light bulb is rated at sixty watts, so it uses less power than the old model.
powernoun	The ability to control, influence, or direct the actions of others or the course of events.	The new law gives regulators more power to fine companies that pollute rivers.
worknoun	Activity involving physical or mental effort done to achieve a purpose or result, especially as employment.	She has a lot of work to finish before the deadline.
frictionnoun	The resistance one surface or object encounters when moving against another, or tension between people.	Friction between the tires and the wet road made the car harder to control.
energy transfernoun	The process by which energy moves from one object, system, or form to another.	Energy transfer from the sun warms the Earth's surface and drives its weather systems.
efficiencynoun	The quality of achieving a desired result with the least waste of time, effort, or resources.	The factory improved efficiency by rearranging the assembly line to reduce wasted motion.
mechanical energynoun	The energy an object possesses due to its motion or position, equal to the sum of its kinetic and potential energy.	A swinging pendulum continuously converts mechanical energy between kinetic and potential forms.
chemical energynoun	Energy stored in the bonds between atoms and molecules, released or absorbed during a chemical reaction.	Batteries store chemical energy and convert it into electrical energy when connected to a circuit.
electrical energynoun	Energy that results from the flow or storage of electric charge.	Wind turbines convert the motion of the blades into electrical energy.
nuclear energynoun	Energy released by splitting or combining atomic nuclei, used to generate electricity or in weapons.	The country plans to expand nuclear energy to reduce its dependence on coal.
biomassnoun	Organic matter, especially plant material, used as fuel or measured as a source of energy.	The power plant burns biomass such as wood chips to generate electricity.

Heat transfer vocabulary

Heat moves between objects in three main ways. Conduction transfers heat through direct contact, such as a metal spoon heating up in hot soup. Convection moves heat through the flow of liquids or gases, like warm air rising in a room. Radiation transfers heat through waves without needing physical contact, which is how the sun warms the Earth.

Solar and renewable energy vocabulary

Renewable energy sources, including solar energy, wind energy, hydropower, and geothermal energy, are naturally replenished and produce fewer emissions than burning fossil fuels. Solar panels convert sunlight directly into electricity, while biomass energy comes from burning organic material. These sources are studied as alternatives to nonrenewable fuels like coal, oil, and natural gas.

Frequently asked questions

What is the difference between conduction, convection, and radiation?

Conduction transfers heat through direct contact, convection transfers heat through moving liquid or gas, and radiation transfers heat through waves without needing any physical medium.