Energy

Question 1

Law of Conservation of Energy

Answer 1

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.

Question 2

electrical energy

Answer 2

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

Question 3

gravitational potential energy

Answer 3

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

Question 4

chemical energy

Answer 4

chemical energy potential energy derived from chemical reactions

Question 5

elastic potential energy

Answer 5

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

Question 6

nuclear energy

Answer 6

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.

Question 7

Conduction

Answer 7

Thermal conduction is the transfer of heat (internal energy) by microscopic collisions of particles and movement of electrons within an organ.

Question 8

convection

Answer 8

Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. Convection above a hot surface occurs because hot air expands, becomes less dense, and rises (see Ideal Gas Law)

Question 9

Radiation

Answer 9

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

Question 10

conductors

Answer 10

In physics and electrical engineering, a conductor is an object or type of material that allows the flow of an electrical current in one or more directions. Materials made of metal are common electrical conductors

Question 11

Insulator

Answer 11

insulator. [ĭn′sə-lā′tər] A material or an object that does not easily allow heat, electricity, light, or sound to pass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators. Compare conductor

Question 12

Density

Answer 12

Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density. An object with little matter in the same amount of volume has a low density. Density is found by dividing the mass of an object by its volume.

Question 13

conduction

Answer 13

conduction transfer of heat through collisions between particles

Question 14

insulators

Answer 14

insulators a material that is a poor conductor of heat

Question 15

radiant heat

Answer 15

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

Question 16

radiation

Answer 16

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

Question 17

convection

Answer 17

convection transfer of heat through the flow of particles

Question 18

luminous

Answer 18

luminous releasing its own light

Question 19

incandescent

Answer 19

incandescent describes objects that emit light when they are hot

Question 20

bio luminescent

Answer 20

bio luminescent describes living things that release light energy

Question 21

non-luminous

Answer 21

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

Question 22

scattered

Answer 22

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

Question 23

visible spectrum

Answer 23

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

Question 24

dispersion

Answer 24

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

Question 25

electromagnetic radiation

Answer 25

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

Question 26

electromagnetic spectrum

Answer 26

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

Question 27

radio waves

Answer 27

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

Question 28

infra-red radiation

Answer 28

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

Question 29

ultraviolet radiation

Answer 29

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

Question 30

X-rays

Answer 30

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

Question 31

gamma rays

Answer 31

gamma rays high energy electromagnetic radiation produced during nuclear reaction

Question 32

A luminous object

Answer 32

gives off their own light

Question 33

Vibrations An incandescent object

Answer 33

emits light because they are hot