energy

Energy that makes machines and lights work

Being very active and excited to do things

More energy than you need for an activity

Feeling tired and weak

Energy from natural sources that come back, like sunlight or wind

Heat or electricity that people make from the sun's light

The US government department that makes energy policy and looks after nuclear safety

The use of less energy to get the same result

Energy from natural sources like the sun or wind that does not run out and causes little pollution

Power made when atoms are split or joined, used for electricity and sometimes weapons

A paper or email that shows how much money you must pay for energy used

A part of the United States government that makes rules and plans about energy and keeps nuclear power safe

Very active and full of strong, lively energy

The ability a moving object has to make things move

A government leader who runs the Department of Energy and plans how the country uses energy

A hopeful, friendly feeling that makes people feel happy and active

Having very large energy levels in physics

A substance that gives off a large amount of energy when it reacts

An international organization that helps countries use nuclear energy safely and peacefully

How much physical or mental strength a person has at one time

Part of a country's economy that produces and supplies power like oil, gas, and electricity

A person who leads the United States Department of Energy and advises the president on energy and nuclear safety

An action that uses effort but achieves nothing useful

Power that something has because of its position, not its movement

A mental force believed to drive thoughts and feelings

Energy used to run devices like lights or phones that comes from power in wires

A process that gives off energy, for example burning or digestion

The ability to think clearly and focus on a task

Amount of energy in a system that can do work

The movement of warmth from a hotter thing to a cooler thing

A former United States government agency that oversaw nuclear energy research and civilian use

Energy made when atoms split or join

How lively and active a place or group feels at a time

A basic physics rule that total energy in a closed system cannot be created or destroyed

Heat from under the Earth's surface that people use to make electricity and warm buildings

A fixed amount of power that an electron in an atom can have

Energy from electricity that powers things like lights and machines

Energy an object has because of its mass, as in E = mc²

Power stored inside substances that is released when they react together

A way to measure energy, like a calorie or joule

A quick increase in how active and awake you feel after food, drink or activity

Energy stored around magnets or flowing electric current

A fixed level of energy a tiny thing like an atom can have

Power that travels through space as light or radio waves

Ability of an object to move things because of its motion or its position

Businesses that make and sell energy from the sun and wind

A person or animal that is very lively and always active

The study of very small particles and how they interact at very high energy

To take in energy from a hit or heat instead of releasing it

A sudden strong feeling that makes you active and excited

The study of tiny particles and the forces between them

A thing that holds energy so it can be used later

Energy needed to separate the parts of an atom, nucleus, or molecule

Energy stored in an object when it is stretched or squeezed like a spring

Work to make energy use more efficient and create new energy sources

Strong, happy feeling that makes other people excited

Total energy in a system that does not gain or lose energy stays the same

Energy equal to a particle's mass when it is not moving, calculated as mass times the speed of light squared

A light bulb that uses less electricity, like an LED or a compact fluorescent

A bulb that uses less electricity than old bulbs, for example LED bulbs

A warm, strong presence that naturally draws other people

A person who makes others feel emotionally tired by being negative or demanding

Inner energy from desire that pushes people to think or act

The smallest amount of energy particles need to start a chemical reaction

A device that uses electricity when switched off or in standby

The idea that mass can turn into energy and energy can turn into mass

Stored power in something when it is stretched or squashed, like a spring

Electricity that chemicals make in a cell or battery

A place with tall machines that use wind to make electricity

The first effort needed to start a task or change

Energy that comes from tiny particles of the same kind swapping positions or states

A confident, free attitude someone shows after a divorce

A confident, bold way of acting often shown by lesbian or queer people

The energy needed to break all the bonds in a molecule into separate atoms

A cautious, changed feeling people have after their marriage ends

A relaxed, joking way some men act after a marriage ends

The smallest amount of energy atoms or molecules need to start a chemical reaction