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Flashcards in Energy Deck (46):
1

Potential Energy

energy that has been charged or under stress and can produce energy from that thing

2

kinetic energy

the energy of movement or moving objects.

3

conduction

conduction: transfer of heat through collisions between particles

4

insulators

insulators: a material that is a poor conductor of heat

5

convection

convection: transfer of heat through the flow of particles

6

radiant heat

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

7

nuclear energy

nuclear energy: the energy stored at the centre of atoms, the tiny particles that make up all substances. Nuclear energy can be released from the radioactive metals uranium or plutonium, and transformed into electrical energy in a nuclear power station.

8

movement

an act of moving.

9

chemical energy

chemical energy: potential energy derived from chemical reactions

10

electrical energy

electrical energy: the energy made available by the flow of electric charge through a conductor

11

sound

vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.

12

gravitational energy

gravitational potential energy: energy stored due to the height of an object above a base level

13

light

the natural agent that stimulates sight and makes things visible.

14

law of conservation of energy

Law of Conservation of Energy: a law that states that energy cannot be made or lost. However, energy can be transformed from one type to another or transferred from one object to another.

15

elastic potential energy

elastic potential energy: the potential energy stored in a stretched elastic material

16

efficiency

efficiency: the fraction of energy supplied to a device as useful energy. It is usually expressed as a percentage.

17

reflected

reflected: bounced off

18

transmited

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

19

absorbed

absorbed: taken in

20

radiation

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

21

deciduous

deciduous: describes plants that lose their leaves during autumn and winter

22

luminous

luminous: releasing its own light

23

incandescent

incandescent: describes objects that emit light when they are hot

24

bioluminescent

bioluminescent: describes living things that release light energy

25

non-luminous

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

26

scattered

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

27

visible spectrum

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

28

dispersion

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

29

electromagnetic radiation

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

30

electromagnetic spectrum

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

31

radio waves

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

32

infra-red radiation

infra-red radiation: low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

33

ultraviolet

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

34

X-rays

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

35

gamma rays

gamma rays: high energy electromagnetic radiation produced during the nuclear reaction

36

rays

rays: the narrow beam of light

37

concave

concave: refers to a lens that is curved inwards

38

convex

convex: refers to a lens that is curved outwards

39

focal point

focal point: the point where light rays ‘close in’ (converge) towards a point

40

lateral inversion

lateral inversion: sideways reversal of images in a mirror

41

refraction

refraction: change in the speed of light as it passes from one substance into another. It usually involves a change in direction.

42

normal

normal: a line is drawn perpendicular to a surface at the point where a light ray meets it

43

image

image: picture of an object

44

retina

retina: curved surface at the back of the eye. It is lined with sight receptors.

45

optic nerve

optic nerve: large nerve that sends signals to the brain from the sight receptors in the retina

46

cornea

cornea: clear, curved outer surface of the eye