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Flashcards in Energy Deck (46):
1

Kinetic Energy

A type of energy that is in motion

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Potential Energy

A type of energy with the potential to become kinetic

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Light Energy

Light energy is a type of kinetic energy with the ability to make types of light visible to human eyes.

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Nuclear

the energy released during nuclear fission or fusion, especially when used to generate electricity.

5

Thermal

Thermal energy is the internal energy of an object due to the kinetic energy

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Sound

Sound energy is a form of energy associated with the vibration of matter

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Electrical

Electrical energy is defined as an electric charge that lets work be accomplished

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Conduction

transfer of heat through collisions between particles

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Insulator

Something that conducts heat poorly

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convection

transfer of heat through the flow of particles

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Radiation

a method of heat transfer that does not require particles to transfer heat from one place to another

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Radiant heat

heat transferred by radiation, as from the sun to the Earth

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Reflect

Bounce off

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Transmitted

passed through something, such as light or sound passing through air

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absorbed

taken in

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Mechanical

It is the energy associated with the motion and position of an object.

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Movement

The way something moves

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Chemical

Energy stored in the bonds of chemical compounds.

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Elastic Potential

Elastic energy is the potential mechanical energy stored in something

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Density

Energy density is the amount of energy stored in a given system or region

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Gravitational Energy

Gravitational energy is the potential energy held by an object because of its high position

22

Law of conservation of energy

The law of conservation of energy, a fundamental concept of physics, states that the total amount of energy remains constant in an isolated system.

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deciduous

describes plants that lose their leaves during autumn and winter

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Luminous

releasing its own light

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incandescent

describes objects that emit light when they are hot

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bioluminescent

describes living things that release light energy

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non-luminous

describes objects that do not emit their own light, but can be seen by reflected light

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scattered

describes light sent in many directions by small particles within a substance

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visible spectrum

different colours that combine to make up white light; they are separated in rainbows

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dispersion

separation of the colours that make up white light. Each colour is bent differently when it enters or leaves a glass prism.

31

electromagnetic radiation

the radiant energy such as radio waves, infrared, visible light, X-rays and gamma rays released by magnetic or electric fields

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electromagnetic spectrum

complete range of wavelengths of energy radiated as electric and magnetic fields

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radio waves

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

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infra-red radiation

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

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ultraviolet radiation

invisible radiation similar to light but with a slightly higher frequency and more energy

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X-rays

high energy electromagnetic waves that can be transmitted through solids and provide information about their structure

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gamma rays

high energy electromagnetic radiation produced during nuclear reaction

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vibrations

repeated fast, back-and-forth movements

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compression

the process of pushing a material into itself

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rarefactions

in sound waves, the layers of air particles that are spread apart (between compressions)

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sound waves

vibrations of particles in the air

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frequency

number of vibrations in one second, or the number of wavelengths passing in one second

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hertz

unit of frequency; its abbreviation is Hz. One hertz is equal to one vibration every second.

44

pitch

the highness or lowness of a sound. The pitch that you hear depends on the frequency of the vibrating air.

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wavelength

distance between two neighboring crests or troughs of a wave. This is the distance between two particles vibrating in step.

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reverberation

longer-lasting sound caused by repeated reflection from hard surfaces