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Flashcards in Energy Deck (37):
1

Kenetic

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

2

Potential

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

3

Gravitational

(potential energy of an object elevated above the ground)

4

Elastic

(energy stored by an elastic object that is stretched, such as a spring or rubber band)

5

chemical


(energy stored in chemicals that, when reacted together such as in burning reactions, release heat, sound or light)

6

Nuclear

(energy stored in the nucleus of atoms that can release energy slowly, such as in a nuclear reactor, or quickly, such as in a nuclear explosion)

7

Electrical

(energy supplied to homes by powerlines and available to your appliances via power outlets in the home)

8

Heat

(energy that causes objects to gain temperature)

9

Light

(energy that may be released, for example, when an object is hot or by a nuclear reaction in a star)

10

Sound

(energy carried by the air in a room and detected by the ear)

11

convection

the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat

12

conduction

the process by which heat or electricity is directly transmitted through the material of a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

13

radiation

the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.

14

density

the quantity of mass per unit volume of a substance.

15

Insulator

poor conductor

16

conductor

poor insulator

17

deciduous

describes plants that lose their leaves during autumn and winter

18

Luminous

releases own light

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incandescent

describes objects that emit light when they are hot

20

bioluminescent

describes living things that release light energy

21

non-luminous

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

22

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

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

23

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

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

24

dispersion

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

25

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

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

26

electromagnetic spectrum

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

27

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

29

ultraviolet radiation

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

30

X-rays

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

31

gamma rays

high energy electromagnetic radiation produced during nuclear reaction

32

vibrations

repeated fast, back-and-forth movements

33

frequency

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

34

hertz

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

35

pitch

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

36

wavelength

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

37

reverberation

: longer-lasting sound caused by repeated reflection from hard surfaces