What is compressed into coal over long periods of time?
an object bottom of feet energy carbon dioxide rays or beams kinetic energy electricity vegetation
A B C D E F G H
Swamp vegetation was compressed to form coal.
Vegetation is compressed into coal over long periods of time.
What is compressed into coal over long periods of time? (A) an object (B) bottom of feet (C) energy (D) carbon dioxide (E) rays or beams (F) kinetic energy (G) electricity (H) vegetation