Calcium carbonates are incorporated into the shells of microscopic marine plants and animals, and then precipitated into the ocean sediments.

This process is which of the following?

evaporite deposition

chemical precipitation

biological precipitation

sediment deposition

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.