4 Please answer the following question according to the Law of Conservation of Matter: Sam mixes 40 grams of backing soda with 20 grams of vinegar to produce a chemical change. After the chemical reaction happens, Sam is left with a clear liquid that has a mass of 50 grams and a gas that has a mass of
_.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.