Answer:
yes 4K + O2 ------>2K20 is true.
Within a physical change, an element can change forms, such as going from solid to a liquid through melting. Color change can also occur during a physical change. Physical changes are very different from chemical changes. In a chemical change the element itself changes into something else within a reaction, such as combustion (burning).
Hope this helped
Obviously since plant cell contains chloroplasts.
