Which best describes the orbit of the Moon around Earth? (S6E1.f) Your

A. Circular with a period of about one month

B. Circular with a period of about one week

C. Elliptical with a period of about one month

D. Elliptical with a period of about one week

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.

i think slash and