Energy And Density Revision

What is density?

The density of a material tells us how much mass there is in a certain volume.

mass (kg) =

density (kg/m cubed) x volume (m cubed)

What is an advantage and disadvantage of coal?

A - reliable
D - makes CO2, long start up time, acid rain.

What is an advantage and disadvantage of oil?

A - reliable
D - makes CO2, oil is needed for other things

What is an advantage and disadvantage of gas?

A - Reliable, quick start up time, less polluting than oil or coal

D - makes CO2

What is an advantage and disadvantage of nuclear?

A - Reliable, produces a lot of energy per kg of fuel, no CO2

D - Very long start up time, produces radioactive waste, risk of accidents, power stations need to be decommissioned at the end of their lives

does solar and wind require fuel?

no

Is solar and wind power reliable?

no because they are weather dependent.

What is an advantage and disadvantage of dams and reservoirs?

A - doesn't need fuel

D - floods habitats

What is an advantage and disadvantage of tidal?

A - doesn't need fuel

D - floods habitats

What is an advantage and disadvantage of biomass?

A - carbon neutral

D - takes up space to grow it.

What is an advantage and disadvantage of geothermal?

A - no fuel needed

D - only certain places are suitable

What is an advantage and disadvantage of wave power?

A - reliable

D - doesn’t work well at large scale

What is the only energy resource that does require fuel?

Biomass

what happens when on energy store decreases?

Another increases

what are some examples of chemical potential?

batteries, food and fuels

what is an example of elastic potential energy?

stretching