Chapter 5 Lesson 3
Science Project 2016
How solar panels work
Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. coal can get burned for heat.
How is Coal Formed? | Mocomi Kids
Spacecraft and space stations such as the International Space Station often use solar panels to generate power.