7I — Energy Flashcards
1
Q
Define joule.
Define Kilojoules.
A
Joule (J): the unit for measuring energy.
Kilojoules (KJ): 1000 joules
2
Q
What are fossil fuels?
A
— Fossil fuels are coal, oil and natural gas
— They are non renewable
— They are formed over millions of years
3
Q
What are renewable energy resources?
A
Energy that is being (or can be) replenished as it is used.
4
Q
How can energy be transferred?
A
— Heating — Light — Sound — Electricity — Forces
5
Q
How are fossil fuels formed?
A
Dead organisms do not decompose (due to lack of oxygen) and are compressed. Heat and pressure convert them into fossil fuels.
6
Q
Name the types of energy stores
A
Kinetic — Movement
Thermal — Heat
Chemical energy
Gravitation Potential Energy
7
Q
List the advantages and disadvantages of renewable energy
A
Advantages — Will not run out — Do not contribute to global warming Disadvantages — Are more expensive than fossil fuels — Are not always available
