Year 8 Energy

Question 1

Potential Energy

Answer 1

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

Question 2

Gravitational Energy

Answer 2

Gravitational energy is the potential energy held by an object because of its high position compared to a lower position.

Question 3

Elastic Energy

Answer 3

Elastic energy is the potential mechanical energy stored in the configuration of a material or physical system as work is performed to distort its volume or shape.

Question 4

Chemical Energy

Answer 4

Chemical Energy is energy stored in the bonds of chemical compounds (atoms and molecules).

Question 5

Electrical Energy

Answer 5

Electrical energy can be used to move charged particles through a wire from a power plant to our homes and businesses.

Question 6

Kinetic Energy

Answer 6

energy which a body possesses by virtue of being in motion

Question 7

Heat Energy

Answer 7

Heat energy (or thermal energy or simply heat) is defined as a form of energy which transfers among particles in a substance (or system) by means of kinetic energy of those particles.

Question 8

Light Energy

Answer 8

Light energy is defined as how nature moves energy at an extremely rapid rate, and it makes up about 99% of the body’s atoms and cells, and signal all body parts to carry out their respective tasks.

Question 9

Sound energy

Answer 9

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

Question 10

Law of conservation Energy

Answer 10

the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time.

Question 11

Efficiency

Answer 11

Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services.

Question 12

Thermal energy transfer

Answer 12

All objects transfer thermal energy by infrared radiation. The hotter an object is, the more infrared radiation it gives off.

Question 13

Conduction

Answer 13

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.

Question 14

Convection

Answer 14

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.

Question 15

Radiation

Answer 15

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

Question 16

Reflection

Answer 16

the throwing back by a body or surface of light, heat, or sound without absorbing it.

Question 17

Transmitted

Answer 17

cause (something) to pass on from one person or place to another.

Question 18

Absorbed

Answer 18

take in or soak up (energy or a liquid or other substance) by chemical or physical action.

Question 19

Conductor

Answer 19

Something that makes the energy stronger

Question 20

Insulator

Answer 20

a substance which does not readily allow the passage of heat or sound.

Question 21

Luminous

Answer 21

giving off light; bright or shining.

Question 22

Incandescent

Answer 22

Incandescence is the light from heat. A fireplace adds a warm incandescence to a house in the winter.

Question 23

Bioluminescent

Answer 23

Bioluminescence is the production and emission of light by a living organism.

Question 24

Non-luminous

Answer 24

Not capable of producing light, but can be capable of reflecting light from another source.

Question 25

Vibrations

Answer 25

an instance of vibrating.

Question 26

Compressions

Answer 26

the action of compressing or being compressed.

Question 27

Rarefactio

Answer 27

reduction in the density of something, especially air or a gas.

Question 28

Frequency/pitch

Answer 28

the rate per second of a vibration constituting a wave, either in a material, or in an electromagnetic field.