Energy Flashcards
Name the nine types of energy
Electrical energy Light energy Sound energy Thermal energy Kinetic energy Gravitational potential energy Nuclear energy Elastic potential energy Chemical energy
Which three are stored forms of energy ?
Gravitational potential energy
Chemical energy
Elastic potential energy
What is the conservation of energy?
Energy can be created or destroyed
What is the formula for work done and what is the unit ?
Force X Distance
Unit - Joules (J)
Name 3 ways in which you can reduce heat loss in a house
Loft insulation - laying fibreglass wool across the loft floor and ceiling reduce heat loss by conduction and radiation
Thick curtains - prevents heat loss by conduction and radiation
Double glazing - reduce conduction and convection
Give 4 types of non renewable energy sources
Oil
Natural gas
Nuclear fuels
Coal
What is the formula for kinetic energy ?
1/2 X mass X speed^2
What is the formula for GPE
Mass X g X h
Give three advantages and three disadvantages of using fossil fuels
Advantages
- Relatively cheap
- It doesn’t rely on the weather so it is reliable
- Don’t need to buy new technology for it
Disadvantages
- Release carbon dioxide into the atmosphere
- Coal and oil release sulfur dioxide which causes acid rain
- They will run out - non renewable
Give three renewable sources of energy
Geothermal energy
Solar energy
Wind energy
What is the formula used to find efficiency ?
Useful energy output
________________________
Total energy input
In which three ways can hear energy be transferred ?
Radiation , conduction and convection
