I will make you brainiest! In this analogy, which part of the lunar cycle is waning - from the new moon to the full moon or the full moon to the new moon?

Can someone me with these questions plz.

An observation that requires measurement is called quantitative observable or qualitative

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?