Energy

Question 1

Types of energy (name at least 3)

Answer 1

Thermal , light, sound , elastic , gravitational, kinetic, electrical , chemical , nuclear

Question 2

Chemical

Answer 2

Food , fuel , batteries

Question 3

Kinetic

Answer 3

Moving objects

Question 4

Thermal

Answer 4

Hot objects

Question 5

Elastic

Answer 5

Stretched , sqashed , twisted objects

Question 6

Gravitational

Answer 6

Objects in high position

Question 7

Atomic/nuclear

Answer 7

Stored inside atoms

Question 8

Atomic/nuclear

Answer 8

Stored inside atoms

Question 9

How can we transfer energy from place to place

Answer 9

Energy can also be transferred between stores by: electricity, light ,sound , heating, forces

Question 10

Which firms of energy are not stores

Answer 10

Types of energy that cannot be stored are light, sound and electrical energy

Question 11

Law of conservation of energy

Answer 11

Energy cannot be destroyed or created only transfered

Question 12

How to work out efficiency

Answer 12

Useful energy given out by the device÷ energy put into it = efficiency

Question 13

Where does energy waste go

Answer 13

It is dissipated (spreads out) and cannot he used for other useful enerrgy transfers - it is wasted

Question 14

How to reduce energy waste

Answer 14

Friction between moving parts can be reduced by lubrication

Question 15

How to prevent hest transfer (name 3)

Answer 15

Cavity wall insulation , double glazing, curtains, draught proofing , roof/loft insulation, reflecting oil in or on walls

Question 16

How is energy transferred through a solid

Answer 16

Conduction : one way of transferring heat by vibrations being passed on from one particle to another

Question 17

What happens when liquid is heated

Answer 17

Heated fluid particles gain energy, they move and spread out more. Fluid becomes lsss dense

Question 18

Radiation

Answer 18

Way of energy transfer. Used to signify transfer of energy by heating

Question 19

Gravitational potential energy

Answer 19

Energy stored because of an objects position in gravitational feild

Question 20

Amount if gpe stored depends on

Answer 20

Mass of an object , how far object is moved upwards, strength if gravity

Question 21

Gpe formula

Answer 21

Mass x gravitational feild strength x change in vertical height = change in gpe

Question 22

Kinetic energy formula

Answer 22

Speed2 x mass x 1/2 = ke